You’ve been told to eat more fibre. You’ve been told to drink more water. Maybe you’ve been handed a leaflet about fruit and vegetables and sent on your way. And for a lot of people with hypermobile Ehlers-Danlos syndrome or hypermobility spectrum disorder, none of it works. Some of it makes things actively worse. The bloating gets worse. The feeling of being completely blocked doesn’t budge. The appointments continue, the advice stays the same, and the problem doesn’t change.
This isn’t because you’re not trying hard enough or eating the wrong things. It’s because constipation in hypermobility is a different problem than constipation in the general population, and almost all of the standard advice was built for the general population version.
The standard constipation model assumes the issue is mostly one of stool consistency and colonic sluggishness. Eat more fibre to bulk up the stool, drink more water to soften it, exercise to speed up transit. That works reasonably well when the gut is basically functioning normally but just needs a nudge. When the gut has rectal hyposensitivity, meaning it can’t reliably feel itself filling, or when the pelvic floor muscles don’t relax properly during defecation, then bulking up the stool doesn’t fix anything. It just gives you more stool that you still can’t pass.
This post is about the actual mechanisms behind constipation in hEDS and hypermobility spectrum disorder. It’s about why the standard advice misses and what the evidence actually says works. We’ll go through the physiology plainly, the interventions in order of evidence quality, and the medications that make the problem worse in ways most people don’t realise.
If you have hypermobility and your gut has never cooperated, this is written for you.
How Common Is Constipation In Hypermobility, Actually?
Very common. Far more common than the general population, and far more common than most GPs are aware.
Up to 73% of people with hEDS or hypermobility spectrum disorder report constipation, compared to 16% of non hypermobile controls [18]. That’s not a modest statistical signal. That’s a four-fold to five-fold increase in a symptom that causes significant daily impairment for many of those living with it.
The data has been building for over a decade. When it comes to the overall picture of GI involvement in hypermobility, 39% of unselected people referred to GI outpatient services had undiagnosed joint hypermobility syndrome when they were specifically evaluated for it [3]. These weren’t specialist hypermobility referrals. These were ordinary GI outpatient cases, people whose gut symptoms had brought them in, and whose underlying hypermobility had never been picked up.
A 20-year experience at Mayo Clinic, spanning 687 patients, found constipation among the three most common GI symptoms in hEDS, alongside abdominal pain and nausea [14]. In secondary care, the association between joint hypermobility syndrome and functional GI disorders holds up in case-control design too, with JHS prevalence in functional GI disorder patients significantly higher than in those with organic GI disease [3].
The IBS-C overlap is also substantial. Joint hypermobility is significantly more prevalent in people meeting IBS-C criteria than in those without [24]. This matters for how we approach treatment, because IBS-C and hypermobility driven constipation share some but not all of the same mechanisms.
What the prevalence data tells us, taken together, is that this is not an occasional coincidence. Constipation is a core GI feature of hypermobility. Most of the studies involved are retrospective or questionnaire based, so we should be honest about evidence quality. But the signal is consistent across different populations, different settings, and different study designs. It’s real.
Why Hypermobile Guts Are Different (The Mechanism Stack)
The reason standard constipation advice fails for people with hypermobility is that there isn’t one mechanism driving their constipation. There’s usually a stack of them, and some of the most important ones aren’t addressed by any lifestyle modification advice at all.
Rectal Hyposensitivity
This is probably the most important single mechanism, and it’s the one that explains why the standard advice is so often useless.
43% of people with hEDS have rectal hyposensitivity, compared to 20% of non hypermobile people with constipation [2]. The rectum literally can’t feel itself filling to the degree it should. Stool arrives, sits there, dries out, becomes harder and more compacted, and the signal that should fire to say “time to go” simply doesn’t fire properly.
Think of it this way. The normal system works like a doorbell. Stool arrives, the rectum distends, the mechanoreceptors fire, you feel the urge to go. In rectal hyposensitivity, the doorbell is broken. Stool can be sitting there for hours and the message doesn’t get through. Adding more fibre is the equivalent of ringing a broken doorbell harder. The door doesn’t open.
This is why high fibre diets often make things worse rather than better for this population. More bulk means more stool that the rectum can’t sense, more distension, more bloating, and eventually a more difficult evacuation.
When it comes to fixing constipation in hypermobility, you can’t start with fibre and water if the sensory system itself isn’t working.
Dyssynergic Defecation
The second major mechanism is about coordination rather than sensation.
In a normal defecation attempt, the external anal sphincter and puborectalis muscle relax as intra-abdominal pressure increases. The passage opens, the stool moves through. In dyssynergic defecation, those muscles contract or fail to relax properly during the attempt, so you’re pushing against a partially closed door.
In hEDS patients compared to matched controls, there is significantly less anal relaxation and higher residual anal pressures during simulated defecation [23]. It’s not weakness. The muscles aren’t too weak to do the job. They’re not coordinating the timing correctly. This is a motor control and proprioception problem, which is consistent with what we know about how hypermobility affects the nervous system’s ability to map and control joint position throughout the body.
When it comes to this specific problem, biofeedback with anorectal manometry is the treatment that works. Not fibre, not more water, not generic exercise. Coordination training, with feedback. More on that in the interventions section.
For deeper reading on the pelvic floor picture specifically, see our comprehensive pelvic floor guide for hypermobility and EDS.
Connective Tissue In The Gut
Collagen rich connective tissue doesn’t just make up joints, ligaments, and skin. It exists throughout the GI tract, in the gut wall itself, in the mesentery, in the structural support of every part of the digestive system. In hEDS, where connective tissue quality is altered, the architecture of the gut wall is different from the general population [5, 18].
Altered tissue means altered peristalsis. The rhythmic muscular contractions that move food and stool through the gut depend on the mechanical properties of the gut wall they’re working through. A wall with different compliance characteristics, different tension profiles, different mechanosensory properties, produces a different movement pattern. This is the structural basis for why the gut behaves differently in hypermobility even before you add in any autonomic or sensory factors.
It’s worth being honest about the evidence here: the connective tissue explanation is biologically coherent and supported by the clinical picture, but we don’t yet have direct histological evidence in hEDS showing the exact gut wall changes. The rationale is strong. The direct proof, in hEDS specific tissue, is still limited [8].
The Autonomic Overlap (POTS And The Gut)
The autonomic nervous system runs the gut. It regulates peristalsis, it controls blood flow to the GI tract, it modulates the enteric nervous system that coordinates all gut movement. In people with hypermobility who also have POTS, GI disorders are significantly more common and more severe than in people with hypermobility alone [17].
The mechanism is fairly direct: POTS involves dysregulated autonomic tone, and the gut bears a significant part of that dysfunction. The sympathetic nervous system, when overactive in ways characteristic of POTS, inhibits enteric nervous system activity and slows colonic propulsion. Erratic autonomic tone produces erratic gut motility, including the constipated end of the spectrum.
For those with hypermobility, POTS, and gut problems, the trifecta of hEDS, POTS, and MCAS is often in play. For a full picture of how these three conditions interact, see POTS, EDS and MCAS: Understanding the Trifecta.
For more on POTS itself, the POTS hub covers the autonomic picture in detail.
Visceral Hypersensitivity
Rectal hyposensitivity is the most prominent mechanism in constipation. But it’s worth flagging its opposite, because some people with hEDS have both, or have hypersensitivity as the dominant picture.
Visceral hypersensitivity means the gut registers pain and discomfort at volumes of distension that wouldn’t cause pain in most people. Normal levels of gas or stool movement produce a pain signal that is out of proportion to the physical stimulus [4, 8]. This is central sensitisation playing out in the gut rather than in the joints or muscles.
This can coexist with rectal hyposensitivity: the rectum doesn’t feel itself filling enough to trigger the defecation urge (hyposensitivity), but the mid-gut registers routine bloating as significant pain (hypersensitivity). Both mechanisms can be present in the same person. This is part of why this patient group is so difficult to manage with standard protocols.
What About Gastroparesis?
A brief, honest note here because it comes up often. Delayed gastric emptying, meaning food staying in the stomach too long, is reported in some hEDS cohorts. Nausea and early fullness are very common GI symptoms in this group. But when it comes to the specific question of whether gastroparesis prevalence is significantly elevated in hEDS compared to matched controls, the evidence is genuinely contested. Some studies find elevated rates, particularly in patients who also have POTS. Others, including case-control data that accounts for confounders like opioid use, find no significant difference compared to general GI clinic populations.
The gastroparesis picture in hEDS is less settled than the constipation picture. Constipation, rectal hyposensitivity, and dyssynergia have consistent, replicated findings behind them. The gastroparesis picture doesn’t, yet. Don’t assume it’s a primary driver of your constipation without investigation.
Why The Standard Advice Misses
Fibre
There is a real evidence base for fibre supplementation in chronic constipation, and the most recent systematic review and meta-analysis confirms it, particularly for soluble fibre like psyllium at adequate doses [19]. But “works on average in general chronic constipation” is not the same as “works when the underlying problem is rectal hyposensitivity and dyssynergia.”
In people with both functional dyspepsia and constipation with dyssynergic defecation, correcting the dyssynergia reduced overall symptoms whereas adding fibre supplementation did not [6]. That finding is from a randomised trial, and it matters. If your constipation is driven primarily by the coordination problem described above, fibre is addressing the wrong mechanism entirely.
Adding bulk to a system that can’t feel itself filling, or can’t relax the exit to push the stool out, doesn’t solve the problem. It compounds it. More stool, sitting there, the rectum not feeling it, the sphincter not relaxing. More bloating, more pressure, same outcome.
This doesn’t mean all fibre is always wrong. Soluble fibre that retains water and softens stool can help with ease of passage once you get to the point of defecation. But it shouldn’t be the first answer handed to someone with hypermobility, and it’s not a mechanism level solution. For the broader picture on diet and supplements in hypermobility and EDS, including how psyllium and other soluble fibres actually fit into a sensible plan, see our guide to the best diet for hypermobility and EDS.
Water
Hydration matters. A dehydrated gut produces harder stools and makes everything more difficult. But the claim that constipation in most people with hypermobility is primarily a dehydration problem doesn’t hold up. Most people with chronic constipation are not significantly dehydrated. Adding more water above what you already drink doesn’t accelerate gut transit. The physiology doesn’t work that way. If your problem is hyposensitivity, more water doesn’t fix the doorbell. If your problem is dyssynergia, more water doesn’t retrain the muscles. It’s a reasonable piece of general health advice but it’s not a constipation intervention for this population.
Stimulant Laxatives
The old claim that long term stimulant laxative use causes irreversible damage to enteric nerves has been examined closely and the evidence doesn’t support it, at least not at therapeutic doses [21]. That’s worth knowing.
But the practical concern about stimulant laxatives isn’t nerve damage. It’s dependence and dose escalation. Most people who use stimulant laxatives regularly find they need more over time to get the same effect. The stimulus response habituates, the dose goes up, the laxatives become a functional requirement rather than an occasional tool. That’s not nerve damage. It’s a practical problem of replacement: pharmacological stimulation replacing the physiological defecation reflex. Use them when you need them. Not as the long term plan.
Exercise
Generic exercise advice is broadly sensible but it runs into a specific problem for a significant proportion of people with hypermobility. When hypermobility coexists with POTS, upright aerobic exercise can exacerbate orthostatic intolerance. Blood pools in the lower body, the gut gets less blood flow, symptoms worsen. Pushing through upright cardio in this situation doesn’t help the gut. It can make things worse.
The POTS exercise model, which starts with recumbent and semi recumbent work and builds from there, is the right starting point. Generic “just move more” advice bypasses this entirely. See our post on POTS and exercise for how to approach this properly.
What Actually Works (In Evidence Order)
1. Time It Right: The Gastrocolic Reflex
The gastrocolic reflex is one of the most powerful physiological prompts for defecation, and most people never think about it deliberately. When food enters the stomach, the body initiates mass movements in the colon. This reflex is strongest after breakfast, the first meal after the overnight fast, and peaks in a window of roughly 20 to 30 minutes after eating.
Sitting on the toilet at that window, footstool in place (see below), for five to ten minutes, is the highest yield, zero cost constipation intervention there is. No medication, no supplement, no gadget. Just timing. The body is primed to go. Work with that.
If you’re not doing this already, start here before anything else.
2. Footstool, Knees Above Hips
Humans did not evolve to defecate in the seated position. The squatting position, knees above hips, changes the anorectal angle in a way that makes evacuation mechanically easier and reduces the muscular effort required.
In a study of 52 healthy adults, a footstool that raises the knees above the hips during defecation reduced straining with an odds ratio of 0.23, and improved the sense of complete emptying with an odds ratio of 3.64 [11]. A separate study comparing three different defecation positions in 28 volunteers found that the squatting position sharply reduced both straining time and time to complete evacuation compared to the standard seated position [16].
Costs about a tenner. Squatting for defecation is what human anatomy was built for. It doesn’t fix hyposensitivity or dyssynergia, but it reduces the mechanical demand on a system that’s already struggling.
3. Magnesium, But The Right Kind
Magnesium works for constipation by a mechanism that doesn’t depend on the gut’s sensory or motor coordination systems. The unabsorbed fraction of magnesium draws water osmotically into the gut lumen, softening stool and stimulating bowel movement. It doesn’t need the rectum to feel itself filling. It doesn’t need perfect sphincter coordination. It just changes the physical properties of the stool.
In a three arm randomised placebo controlled trial comparing senna, magnesium oxide 1.5g daily, and placebo in chronic constipation, magnesium oxide produced response in around 70% of participants vs around 12% on placebo [12]. Senna performed similarly to magnesium oxide in that trial, both of them clearly ahead of placebo. That’s a substantial effect size for a cheap, widely available supplement.
The magnesium oxide versus citrate question is less settled than supplement marketing makes it sound. Magnesium oxide has lower absorption (around 4%) than citrate (around 25 to 30%), which actually works in its favour for constipation: the unabsorbed fraction is what draws water into the gut. The RCT evidence is for oxide. Citrate is generally better tolerated for daily use because the lower GI effect tends to be gentler and more predictable. Both work through the same fundamental mechanism. Don’t pay premium prices based on absorption claims designed for entirely different purposes.
When it comes to starting magnesium, 300 to 400mg daily of elemental magnesium is a reasonable starting point. Go low and slow if your gut is sensitive.
4. Osmotic Laxatives (PEG) For Persistent Cases
When the basics aren’t enough, polyethylene glycol is the first pharmacological step. It works by the same osmotic principle as magnesium: pulls water into the stool without stimulating the gut to contract. Doesn’t whip the gut. Doesn’t habituate. Doesn’t carry the dose escalation concern of stimulants.
In a network meta-analysis of 33 randomised controlled trials covering 17,214 people, PEG, prucalopride, and linaclotide all showed efficacy for chronic constipation. At 4 weeks, bisacodyl and sodium picosulfate ranked first, but by 12 weeks prucalopride 2mg ranked first for sustained efficacy [10]. PEG is available over the counter and is generally the gentle first step before considering prescription agents.
If PEG alone isn’t enough, the prescription secretagogues (linaclotide, lubiprostone) and prokinetics (prucalopride) have strong evidence behind them and are worth a conversation with your GP or gastroenterologist. Prucalopride works by directly stimulating colonic motility via serotonin receptors in the myenteric plexus, which bypasses some of the autonomic dysfunction that slows the gut in POTS. That’s a relevant mechanistic advantage for the hypermobility POTS population.
5. Slow Breathing
This sounds less impressive than it is. Slow, diaphragmatic breathing at around 6 cycles per minute, typically 4 seconds in and 6 seconds out, for 30 minutes a day, shifts the autonomic nervous system toward parasympathetic dominance. The parasympathetic nervous system is the “rest and digest” side. It’s the side that runs gut motility.
In a pilot study of 85 patients with IBS-C, this protocol improved symptom scores and changed rectal sensitivity over 6 weeks [9]. It’s pilot data, not a definitive trial, and the population was IBS-C rather than hEDS specifically. But the mechanism is directly relevant to hypermobility with autonomic dysfunction: more parasympathetic tone means better gut motility and, potentially, changed rectal sensation thresholds.
Free, no side effects, can be done lying down. For people with POTS who can’t do much upright, that last point matters.
6. Abdominal Massage
Ten minutes, clockwise, following the path of the colon: right side up (ascending), across the top (transverse), left side down (descending). Done daily, preferably in the morning before or after the gastrocolic reflex window.
A 2025 systematic review and meta-analysis found real evidence of benefit for chronic constipation symptoms with abdominal massage, including increased defecation frequency and reduced gut transit time [7]. It’s not the strongest intervention on this list, but it’s non invasive, low risk, and something you can do yourself at home without waiting for a referral.
When it comes to the pacing reality of chronic illness, this is one of the more accessible daily interventions. Do it lying down if you have POTS. Five minutes counts.
7. Pelvic Floor Biofeedback With Sensory Retraining
This is where the most powerful evidence lives, and it’s the one most people never get referred to.
For dyssynergic defecation, biofeedback with anorectal manometry achieved 80% major improvement at 6 months compared to 22% with PEG laxatives [1]. That gap is not a rounding error. It’s the difference between an intervention that addresses the mechanism and one that works around it.
For rectal hyposensitivity specifically, barostat-assisted sensory retraining normalised rectal sensation in 81% of patients, compared to 56% for the simpler syringe based version [15]. Both improved things. The specialist version improved things more.
The important caveats: this is not Kegel exercises. It’s not generic pelvic floor physiotherapy. It requires anorectal manometry, a specialist who knows what they’re doing with the equipment, and a minimum of several sessions over weeks. The barostat-assisted version that achieves the 81% figure requires specialist equipment not widely available in NHS settings. Standard biofeedback addressing dyssynergia is more accessible. If you’re in the UK, waiting times for specialist pelvic floor services can be long. It doesn’t make the intervention less effective. It makes it harder to access.
If you have constipation that hasn’t responded to PEG, osmotic laxatives, magnesium, and the lifestyle interventions above, the right next conversation is about anorectal manometry to confirm the mechanism, and then referral to a specialist biofeedback service. Not more fibre.
8. Acupuncture (Modest Evidence, Low Risk)
When it comes to acupuncture for functional constipation, a systematic review and meta-analysis found a measurable benefit over sham acupuncture in terms of complete spontaneous bowel movements [20]. The evidence base has limitations: the RCTs in this area have come predominantly from China, and heterogeneity across studies is high. The evidence quality is moderate at best.
But the risk profile is low, and for people who’ve tried multiple approaches without adequate relief, it’s worth consideration. Don’t lead with it. Stack it on top of the higher yield interventions.
9. The Last Resort: Sacral Nerve Stimulation
Sacral neuromodulation, meaning electrical stimulation of the sacral nerve roots via an implanted device, has better evidence for faecal incontinence than for constipation. In a single centre follow up study, success rates for isolated constipation were modest, with meaningful complication rates alongside the treatment burden of an implanted device [22].
For isolated constipation, the long term outcomes are poor enough that this should genuinely be a last resort: only when every other option has been exhausted and clearly failed, after confirmed dyssynergia or hyposensitivity has been treated with biofeedback without success. Not a first or even fifth step.
The Medication Picture (When Other Conditions Are In Play)
hEDS rarely arrives alone. When it comes to constipation in hypermobility, the other conditions being managed can themselves be significant drivers of the gut problem.
GLP-1 receptor agonists (Ozempic, Wegovy, Mounjaro). These drugs slow gastric emptying. That’s not a side effect, that’s part of how they work. Adding them to an already sluggish hypermobility gut compounds the problem in a predictable way. If you have hEDS and you’re starting a GLP-1 agonist for weight management or diabetes, have a bowel management plan in place from the start. We’ve covered this in detail in the Ozempic, EDS, and chronic pain post.
Antihistamines used for MCAS. First generation H1 antihistamines (chlorphenamine, hydroxyzine, promethazine) have significant anticholinergic activity. They block the muscarinic receptors in the gut wall that drive peristalsis. Constipation is a documented adverse effect. Second generation antihistamines (cetirizine, loratadine, fexofenadine) carry much less of this risk. If you have hypermobility associated MCAS and your constipation has worsened since starting antihistamines, that’s not a coincidence. See our MCAS post for the broader picture.
Beta blockers used for POTS. Propranolol is a non selective beta blocker used to manage heart rate in POTS. Beta adrenergic blockade is known mechanistically to slow gut motility, and direct trial evidence in the POTS population specifically is thin, but if your gut was already being pushed in the wrong direction by autonomic dysfunction, adding a drug class that can slow it further is worth being aware of. Ivabradine, which reduces heart rate without beta blocking, is generally less associated with constipation as a side effect and is increasingly favoured in POTS for that reason. This is worth raising with your prescriber if you’re on propranolol and constipation has become a significant problem.
The trifecta article covers how these three conditions interact and how their treatments can compound each other: POTS, EDS and MCAS: Understanding the Trifecta.
When To Push For Specialist Workup
If constipation hasn’t responded to the basics, PEG, magnesium, gastrocolic reflex timing, and footstool, you should be pushing for proper investigation rather than more of the same.
Anorectal manometry and balloon expulsion test. This is the diagnostic gold standard for dyssynergia. The balloon expulsion test, specifically, asks whether you can expel a fluid filled balloon from the rectum within about a minute. If you can’t, that’s a positive test for outlet dysfunction. Combined with high-resolution anorectal manometry, this tells you whether you have dyssynergia, hyposensitivity, or both. It changes the treatment direction completely.
Whole gut transit study. Slow transit constipation (slow colonic transit rather than outlet dysfunction) accounts for a minority of the constipation picture in hEDS. The research suggests that whole gut transit delay is no more common in hEDS than in general constipated populations when controlled properly. But a transit study is useful if your constipation is severe (less than one bowel movement per week), if you’re considering prescription prokinetics, or if you have no urge to defecate even with soft, easy stools.
Defaecography. For suspected structural problems, particularly rectocele, enterocele, or rectal prolapse, dynamic MRI defaecography is the gold standard. When it comes to interpreting the results in hEDS, a critical point from the research: structural abnormalities on defaecography are common in all patients with functional constipation, not just those with hypermobility. hEDS doesn’t significantly increase your rate of structural defaecography findings above what matched constipated controls show [2]. That means defaecography is indicated when you have specific clinical features suggesting structural obstruction, such as the need to manually support the perineum to complete defecation, not as a routine investigation for all hEDS patients with constipation. Post hysterectomy, with known pelvic organ prolapse, or when standard approaches have failed, are more appropriate triggers.
Red flags. These warrant investigation regardless of your known hypermobility: blood in stool, unexplained weight loss, sudden onset of constipation without a previous history, overflow incontinence (liquid stool bypassing a solid impaction, often mistaken for diarrhoea), alternating constipation and loose stool. These need proper investigation before any assumption that it’s all just hypermobility gut behaviour.
When You’re Already Exhausted (The Pacing Angle)
Many of the things on this list ask for daily consistency. Daily massage. Daily breathing practice. Daily bowel routine timed to the gastrocolic reflex. People managing hypermobility, POTS, and chronic pain know that consistency is not cheap. It costs energy that’s already in short supply.
Don’t try to implement everything at once. Start with the two highest yield, lowest cost interventions: gastrocolic reflex timing and a footstool. They require no extra time, no appointment, no waiting list, and no medication. If those move the needle, stay there for a few weeks before adding anything else.
The abdominal massage and slow breathing can stack on top when the basics are working and when you have capacity. The magnesium comes in if lifestyle alone isn’t enough. Biofeedback is the conversation to have with your GP when you’ve done the basics and they haven’t been sufficient.
Progress doesn’t have to mean doing everything simultaneously.
Bottom Line
Constipation in hypermobility and hEDS isn’t primarily a problem of slow transit or inadequate fibre intake. The dominant mechanisms are rectal hyposensitivity (the rectum can’t feel itself filling properly) and dyssynergic defecation (the exit muscles don’t relax properly during the attempt). Standard advice built around fibre and water doesn’t address either of those mechanisms, which is why it so often fails.
The order of operations that the evidence supports: gastrocolic reflex timing and a footstool first, because they cost nothing and have immediate physiological rationale. Magnesium if those aren’t enough, because it works through osmosis rather than sensation. PEG for persistent cases. Slow breathing and abdominal massage as daily adjuncts that improve autonomic tone and colonic transit. And for anyone who has been through all of that without adequate relief, anorectal manometry to confirm the mechanism, followed by proper biofeedback with sensory retraining. That’s the intervention with the strongest evidence, and it’s the one that’s actually built for the problem.
Review your medications. GLP-1 agonists, first generation antihistamines, and beta blockers can all drive constipation in ways that pile on top of the underlying problem.
Frequently Asked Questions
Why does fibre make my bloating worse?
Because when constipation is driven by rectal hyposensitivity or dyssynergia, adding fibre means adding bulk to a system that already can’t move things properly. More stool sits in the gut longer. It ferments. It produces gas. The bloating you feel isn’t a reaction to fibre itself, it’s the consequence of the stool sitting there for longer than it should, with bacteria doing their usual job on whatever isn’t being moved out. If you can’t feel the rectum filling and can’t fully relax the exit, more fibre doesn’t help. The AGA’s 2023 clinical practice update on bloating directs investigation toward motility and pelvic floor causes when bloating and constipation coexist, rather than reflexively adding more bulk-forming fibre [13].
Should I be taking magnesium every day?
For most people with hypermobility and chronic constipation, daily magnesium is a reasonable ongoing strategy rather than an occasional supplement. The mechanism (osmotic water retention in the gut) doesn’t habituate the way stimulant laxatives can. Magnesium citrate is generally better tolerated for daily use. Magnesium oxide is what the RCT evidence uses. Start low (around 200mg elemental magnesium at night) and increase until you get a consistent response without loose stools. If you have kidney problems, check with a doctor before supplementing magnesium regularly.
How long should I sit on the toilet?
Five to ten minutes, timed to the gastrocolic reflex window, 20 to 30 minutes after breakfast. That’s it. Sitting longer than that doesn’t help and increases pressure on the pelvic floor. If nothing has happened in ten minutes, get up. Come back tomorrow at the same time. Consistency with timing matters more than duration of each attempt.
Can I do pelvic floor biofeedback without a specialist?
The evidence based version requires anorectal manometry equipment and a trained specialist. Apps and home devices that purport to do pelvic floor biofeedback don’t have the same evidence base for dyssynergia or hyposensitivity specifically. Some home devices can be useful for general pelvic floor awareness, but they don’t replicate what a specialist biofeedback session does. If you’re trying to address the mechanism, not just do something vaguely helpful, you need the specialist version. Ask your GP for a referral to a specialist GI physiology unit or colorectal physiotherapy service.
What’s the difference between rectal hyposensitivity and visceral hypersensitivity?
Rectal hyposensitivity means the rectum doesn’t register that it’s filling. The signal from mechanoreceptors in the rectal wall is blunted. You don’t feel the urge to defecate when you should. Visceral hypersensitivity is the opposite: the gut registers normal volumes of content, gas, or movement as disproportionately painful or uncomfortable. Both can occur in hEDS. They can coexist in the same person, with hyposensitivity in the lower rectum and hypersensitivity in the mid-gut. That’s part of why hypermobility gut symptoms don’t follow predictable patterns.
Is constipation in EDS the same as IBS-C?
Overlapping, but not the same. IBS-C is a symptom-based diagnosis defined by constipation with abdominal pain and altered bowel habits. Many people with hEDS meet IBS-C criteria. But hEDS-associated constipation has specific pathophysiological features, particularly the rates of rectal hyposensitivity and dyssynergia documented in the research, that go beyond the general IBS-C population. The treatments with the strongest evidence for the general IBS-C population (fibre, antispasmodics, low FODMAP diet) don’t address these mechanisms specifically. The hEDS version needs investigation of the sensory and motor picture, not just symptom management.
