A pessary can affect bowel movements in both directions. For many women with pelvic organ prolapse, a well-fitted pessary reduces straining, eases incomplete evacuation, and improves overall bowel function. For others, particularly during the early adjustment period or if the device fits poorly, a pessary can contribute to constipation or a feeling of rectal pressure. The relationship is more nuanced than a simple yes-or-no, because the prolapse itself is usually already disrupting normal bowel habits before a pessary enters the picture.
Prolapse and Bowel Problems Often Arrive Together
To understand how a pessary affects your bowels, it helps to know that pelvic organ prolapse and bowel dysfunction are deeply intertwined. In a study of over 300 women with prolapse and incontinence, about 36% met criteria for constipation, with the most common subtype being outlet constipation, where stool reaches the rectum but is difficult to push out.1PubMed. Functional bowel and anorectal disorders in patients with pelvic organ prolapse and incontinence Other research puts the numbers higher. A prospective study of postmenopausal women with prolapse found that 77% had defecatory dysfunction.2International Journal of Reproduction, Contraception, Obstetrics and Gynecology. Prevalence of voiding and defecatory dysfunction in postmenopausal women with pelvic organ prolapse: a prospective observational study A five-year retrospective study at a tertiary center found defecatory dysfunction in about 44% of women with prolapse symptoms, with advanced posterior wall prolapse identified as a risk factor.3PubMed. Defecatory dysfunction and anal incontinence symptoms among women with pelvic organ prolapse: 5-year retrospective study in a tertiary center
The reason is largely mechanical. When the vaginal walls or uterus descend, they can push against the rectum or create a pocket (called a rectocele) that traps stool. Women with this kind of prolapse often describe needing to press a finger against the vaginal wall to complete a bowel movement, a technique called “splinting.” They may also experience a persistent sensation of incomplete evacuation, excessive straining, or a feeling of blockage even when stool is soft. So when a pessary is placed and bowel habits change, the question is rarely “did the pessary cause a new bowel problem?” and more often “did the pessary shift the bowel problem that was already there?”
How a Pessary Can Improve Bowel Function
A pessary works by physically supporting the prolapsed tissue. When that tissue is no longer pressing into the rectal space, stool can move through more normally. This is essentially the same principle as manual splinting, except the pessary provides constant, hands-free support. For women whose bowel trouble is driven by a rectocele or posterior compartment prolapse, the improvement can be substantial.
A study that tracked women over 12 months of pessary use found significant improvements in both bowel-related symptoms and bowel-related quality of life.4PubMed. The impact of pessary use on bowel symptoms: one-year outcomes Women reported less straining, less sensation of incomplete emptying, and fewer episodes of difficulty with bowel movements. Research on vaginal stents used specifically for rectocele with outlet obstructive constipation found the device significantly decreased straining intensity, shortened straining time, reduced laxative use, and alleviated the feeling of incomplete evacuation.5PubMed. Improvement in Outlet Obstructive Constipation Symptoms After Vaginal Stent Treatment for Rectocele That study also showed increased rectal pressure and shorter balloon expulsion time, meaning the rectum was mechanically working better with the support in place.
The symptoms most likely to improve are the ones tied to outlet obstruction: the feeling that stool is “stuck,” the need for prolonged straining, and the need to use your fingers to assist with evacuation. If your constipation is more of a slow-transit type, where stool moves sluggishly through the entire colon rather than getting stuck at the exit, a pessary is less likely to make a noticeable difference. This distinction matters, and it is worth discussing with your provider if constipation is a major concern.
When a Pessary Might Make Bowel Symptoms Worse
Not every woman experiences bowel improvement. In a study of 273 women fitted with ring pessaries, 167 were still successfully using the device at four weeks. Among those continuing users, 56% experienced at least one complication over the study period, with constipation listed among the adverse events alongside bleeding, discharge, extrusion, and pain.6PubMed. Long-term vaginal ring pessary use: discontinuation rates and adverse events Constipation was not the most common complaint in that study, but it was common enough to be tracked as a recognized side effect.
A pessary that is too large, positioned incorrectly, or not well matched to your anatomy can press on the rectum in a way that narrows the passage for stool. Instead of lifting prolapsed tissue away from the rectal canal, the device itself becomes the source of pressure. Symptoms of a poorly fitting pessary affecting your bowels include new-onset constipation that was not present before, a feeling of rectal fullness or blockage that worsens after insertion, pain during bowel movements, or a sense that you cannot fully empty. These symptoms typically resolve once the pessary is refitted or swapped for a different type or size.
The adjustment period matters too. During the first few weeks, it is common to be more aware of pelvic sensations, and some women alter their diet, fluid intake, or toilet habits (consciously or not) in response to the device. These behavioral shifts can temporarily affect regularity. If new bowel symptoms do not settle within a few weeks, that is a signal to go back for a fitting reassessment rather than assuming the pessary simply does not work.
Different Pessary Types, Different Effects
Pessaries come in a wide range of shapes and sizes, and the type you use can influence how your bowels respond. Ring pessaries, the most commonly prescribed type, sit in a circle around the cervix and provide general support. They tend to have less direct contact with the posterior vaginal wall. Space-filling pessaries like the Gellhorn, cube, or donut occupy more volume and may provide better support for posterior prolapse, but they also take up more room in the pelvis and are more likely to press on adjacent structures, including the rectum.
For women whose primary concern is bowel dysfunction from a rectocele, a pessary that specifically supports the posterior compartment often gives the best results. Your provider may try different types to find one that supports the prolapse without creating new rectal pressure. This trial-and-error process is normal and worth the patience it requires. Many women try two or three pessaries before settling on the right one.
Women who self-manage their pessary by removing it at night and reinserting it in the morning sometimes notice that their bowels work differently depending on whether the device is in or out. If you find bowel movements easier without the pessary in place, you can time your morning routine accordingly. This flexibility is one of the advantages of self-managed care and is one reason many providers encourage patients to learn insertion and removal.
Pessary Versus Surgery for Bowel Symptoms
A common question is whether surgery would do a better job of resolving bowel symptoms than a pessary. A randomized clinical trial published in JAMA compared pessary treatment with surgical repair for symptomatic pelvic organ prolapse. On the bowel symptom subscale, both groups improved, and there was no significant difference between them.7JAMA. Effect of Pessary vs Surgery on Patient-Improvement in Patients With Symptomatic Pelvic Organ Prolapse: A Randomized Clinical Trial Overall subjective improvement was reported by about 76% of women in the pessary group and about 82% in the surgery group at 24 months, a difference that was not statistically significant for noninferiority.
This is reassuring if you are weighing your options. Surgery does not appear to offer a clear bowel advantage over a pessary for most women. Given that surgery carries its own risks (including the possibility of new bowel symptoms from scarring, mesh complications, or anatomical changes), the comparable bowel outcomes give many women and their providers a reason to try pessary management first. Surgery remains an important option, particularly for women who cannot tolerate a pessary, who have very advanced prolapse, or whose prolapse recurs despite a well-fitted device.
Rare but Serious Bowel Complications
Serious bowel complications from a pessary are uncommon but not unheard of, and they are almost always tied to a neglected device. A pessary that remains in place for years without follow-up can erode through vaginal tissue. Case reports describe neglected pessaries causing rectovaginal fistulas, which are abnormal connections between the vagina and rectum that allow stool or gas to pass through the vagina.8PubMed. Neglected pessary causing a rectovaginal fistula: a case report There is also at least one published case of a mechanical bowel obstruction caused by an impacted vaginal pessary.9PubMed. Vaginal pessary-induced mechanical bowel obstruction
These complications are preventable. Regular follow-up visits, typically every three to six months for women who do not remove the pessary themselves, allow a provider to check for erosion, clean the device, and inspect the vaginal tissue. Women who manage their pessary at home by removing it regularly are at lower risk for erosion-related problems because the tissue gets periodic relief and any early issues are more likely to be noticed. If you ever experience sudden inability to have a bowel movement, severe abdominal pain, or notice stool or gas coming through the vagina, seek medical attention promptly.
Other Bowel Symptoms Beyond Constipation
The conversation about pessaries and bowels tends to focus on constipation, but other bowel symptoms can be affected too. Some women with prolapse experience fecal incontinence, difficulty controlling gas, or fecal urgency. These symptoms can be related to the same pelvic floor weakness that allowed the prolapse to develop. Research at a tertiary center found that anal incontinence was present in about 42% of women with prolapse symptoms, making it nearly as common as defecatory dysfunction in that population.3PubMed. Defecatory dysfunction and anal incontinence symptoms among women with pelvic organ prolapse: 5-year retrospective study in a tertiary center
Whether a pessary helps with fecal incontinence is less straightforward than its effect on outlet constipation. The mechanism is different: outlet constipation improves because the pessary lifts tissue off the rectal canal, but fecal incontinence involves the sphincter muscles and nerve signaling rather than a physical blockage. Some women report improvement in incontinence episodes when using a pessary, possibly because the general pelvic support reduces the strain and pressure patterns that contribute to leakage. Others notice no change or occasionally report that the pessary’s presence makes them more aware of rectal sensations, which can feel like urgency even when it is not.
Rectal pressure is another symptom worth mentioning. Some women feel a heaviness or fullness in the rectal area when the pessary is in place, particularly with larger or space-filling types. This does not necessarily mean the pessary is obstructing the bowel. It can simply be the sensation of something occupying the vaginal space that was previously empty. If the sensation does not interfere with actual bowel movements, it is generally not a concern. If it does, a smaller device or a different shape may solve the issue.
Practical Tips for Managing Bowel Symptoms With a Pessary
If you are using a pessary or about to start, a few practical strategies can help minimize bowel disruption and maximize the benefits:
- Track your symptoms: Keep a brief daily log of bowel habits for the first month after fitting. Note frequency, consistency, straining effort, and any sensation of incomplete emptying. This gives your provider objective information to work with at your follow-up.
- Maintain soft stool: Adequate fiber (around 25 grams per day for most women), plenty of water, and regular physical activity keep stool soft enough to pass without excessive straining, which reduces pressure on both the pessary and the pelvic floor.
- Time bowel movements: If you remove your pessary daily, try having your bowel movement before reinserting it in the morning. Many women find evacuation easier without the device in place.
- Do not ignore new symptoms: Constipation that was not present before the pessary, pain during bowel movements, or any bleeding from the rectum warrants a call to your provider. These may indicate a sizing issue or tissue irritation.
- Keep follow-up appointments: Regular check-ins catch erosion, fit changes, and emerging complications early. Your body’s shape and tissue integrity can change over time, meaning a pessary that fit well a year ago may not fit well now.
When Pelvic Floor Therapy Fits In
A pessary addresses prolapse mechanically, but it does not strengthen the pelvic floor muscles that contributed to the prolapse. Pelvic floor physical therapy is often recommended alongside pessary use and can have its own positive effects on bowel function. Strengthening the muscles that support the rectum and learning to coordinate relaxation during defecation can reduce straining and improve evacuation independent of the pessary. Some women find that after several months of combined therapy, their prolapse symptoms improve enough that they can reduce how often they use the pessary or occasionally go without it.
Pelvic floor therapy can also help with fecal incontinence and urgency in ways a pessary cannot. Biofeedback training, which teaches you to better sense and control your anal sphincter and pelvic muscles, has a solid evidence base for improving bowel control. If your bowel symptoms extend beyond the obstructive type, asking for a referral to a pelvic floor physiotherapist is worth considering even if your pessary is working well for the prolapse itself.
The combination of a pessary providing structural support while physical therapy builds muscular support gives many women better overall outcomes than either approach alone. Your provider can help you decide whether both approaches make sense for your particular pattern of symptoms. In general, any woman with prolapse-related bowel complaints benefits from at least an initial pelvic floor assessment, regardless of whether she ultimately opts for a pessary, surgery, or watchful waiting.