Stoma Prolapse: Causes and Management

A stoma prolapse is when part of the bowel pushes out through the stoma, making it visibly longer — sometimes by several centimetres. It is one of the commonest late complications of stoma surgery, especially after a loop colostomy, and most cases are managed without an operation. A stoma that turns dark, becomes painful or cannot be reduced needs urgent assessment.

How common is a stoma prolapse, and which stomas are affected?

Prolapse is reported in something in the region of 1–16% of all stomas, but that headline figure hides a very wide range between stoma types. Published rates vary because studies define prolapse differently, follow patients for different lengths of time, and include different mixes of emergency and planned surgery.

Why loop stomas prolapse more often

A loop stoma brings a longer, more mobile segment of bowel to the skin surface, and the distal (efferent) limb is relatively unsupported. Transverse loop colostomies carry the highest reported risk, with figures up to around 30% in some series. End colostomies sit in the middle, and end ileostomies — which tend to be shorter, more firmly fixed and less bulky — are affected least often, typically in only a small percentage of cases.

Does a prolapse mean the surgery was done badly?

Not usually. Prolapse is a recognised, anticipated complication rather than proof of a technical error, and the same operation performed impeccably can be followed by prolapse in one person and not another. Emergency stomas fashioned during perforation, obstruction or severe sepsis are harder to construct optimally, and that context matters more than any judgement about the surgeon’s technique.

What causes a stoma prolapse?

Prolapse is ultimately caused by a combination of structural, surgical and physiological factors that allow the bowel to slide outward through the trephine — the surgically created hole in the abdominal wall.

Surgical and anatomical factors

• Stoma type: loop stomas, particularly transverse loop colostomies, carry the greatest risk because a longer, more mobile segment of bowel is brought to the surface and the efferent limb is relatively unsupported.
• Size of the trephine: if the opening in the abdominal wall is fashioned too large, there is less resistance to the bowel moving outward through it.
• Inadequate fixation: when the bowel is not secured firmly to the fascia at the time of surgery, it keeps more mobility than it should.
• Emergency versus planned formation: stomas created during acute illness may be technically less optimal than elective formations.
• Site of the stoma: stomas brought out through the rectus abdominis muscle are generally thought to have better support than those placed laterally, although the evidence is not unanimous.

Patient and lifestyle factors

Raised intra-abdominal pressure is the common thread linking most patient-related risk factors:

• Obesity: increased abdominal wall tension and thick adipose tissue reduce fascial support and make appliance fitting harder.
• Chronic cough: repeated pressure surges from asthma, chronic obstructive pulmonary disease (COPD) or smoking.
• Straining: constipation, straining to pass urine because of prostate enlargement, or heavy lifting all generate sudden pressure spikes.
• Pregnancy and ascites: any cause of sustained raised abdominal pressure may precipitate or worsen a prolapse.
• Physical activity: high-impact or heavy resistance exercise raises intra-abdominal pressure transiently, and this matters most in the early post-operative months.
• Age and connective tissue: older age and inherently lax connective tissue make prolapse more likely.

A useful way to think about it

Think of the stoma as a sleeve passing through a buttonhole in a piece of cloth. If the hole is a little generous, the fabric is soft, and something keeps pushing from behind, the sleeve will creep forward. Reducing the pushing — coughing, straining, lifting — and supporting the fabric are the basis of conservative care.

Prolapse or parastomal hernia? Telling the difference

These two complications are often confused, and they commonly coexist.

• A prolapse is bowel mucosa protruding through the stoma itself. What you see is moist, pink-red, warm tissue emerging from the centre of the stoma, continuous with the stoma lining.
• A parastomal hernia is a bulge in the abdominal wall next to the stoma, covered by normal skin, caused by bowel or fat pushing through a weakness in the muscle layer. The stoma itself may look unchanged.

A soft bulge beside the stoma that disappears when you lie down suggests a hernia. A lengthening stoma that reduces when you lie flat suggests a prolapse. Both can be present together, and both are assessed in the same clinic appointment; imaging such as a CT scan is sometimes used when the diagnosis is unclear or surgery is being planned.

Recognising a stoma prolapse

What it looks like

The characteristic appearance is an elongated, cylindrical or conical protrusion of moist, reddish-pink bowel mucosa extending beyond the abdominal surface. Length can range from a couple of centimetres to, in extreme cases, 20 cm or more. Some prolapses are fixed; others lengthen during the day and shrink overnight or when you lie down.

Degrees of prolapse

Clinicians sometimes classify prolapse by whether it can be reduced:

• Reducible prolapse: the bowel slides back spontaneously, often when lying flat, or can be gently returned manually.
• Irreducible prolapse: the bowel stays out and cannot be reduced — this warrants prompt medical review.
• Incarcerated or strangulated prolapse: the blood supply to the protruding segment is compromised. The mucosa becomes dusky, blue-purple or black. This is a surgical emergency.

Associated symptoms may include difficulty fitting the appliance, leakage, dragging discomfort, bleeding from the fragile mucosa, and, in severe cases, obstruction.

Red flags: when to seek urgent help

Contact emergency services or your surgical team the same day if the stoma:

• turns dark red, purple, blue or black;
• becomes hard, swollen and painful;
• stops producing output, particularly with abdominal swelling, vomiting or cramping;
• bleeds continuously or develops ulcers;
• cannot be reduced and feels tight rather than soft.

How a clinician assesses a prolapse

Assessment is usually straightforward and does not require elaborate testing. Your stoma care nurse or surgeon will look at the stoma lying down and standing up, measure its length, check the colour and condition of the mucosa, and examine the abdominal wall for a coexisting hernia. They will ask about output, leakage, skin soreness, coughing, lifting, constipation and weight change. Blood tests may be checked if there is bleeding or concern about fluid loss, and imaging or endoscopy is reserved for unclear cases or pre-operative planning.

Conservative management

For many people, particularly those with small or intermittent prolapses, non-surgical approaches provide effective ongoing management.

Appliance adaptations

A standard flat baseplate may no longer be suitable when a stoma prolapses. A stoma care nurse can advise on larger-aperture, flexible baseplates, soft convexity, or one-piece systems that accommodate a stoma whose length changes through the day. The aim is a secure seal around the base of the prolapse without cutting into the mucosa. Measuring the stoma when it is at its longest, rather than first thing in the morning, often gives a better fit.

Manual reduction: how it is taught

Patients and carers can be taught to reduce a prolapse. The general approach is:

1. Lie flat, with knees bent, to reduce the effect of gravity.
2. Relax the abdominal muscles and breathe slowly; a cool damp cloth applied to the mucosa can lessen swelling and make reduction easier.
3. Apply gentle, sustained inward pressure with the flat of the hand — never poke, pinch or force the delicate mucosa.

Some stoma care nurses use a sugar dressing on a swollen prolapse, an old nursing technique that draws fluid out of oedematous tissue; the evidence is limited and it should only ever be done under clinical guidance. Manual reduction should only be attempted after instruction from your stoma care nurse or clinician.

Supporting the abdominal wall

A properly fitted support belt or Hernia belt-style garment can provide gentle external support and reduce how often the prolapse appears, particularly during activity. Belts must not be so tight that they cause pressure damage or obstruct output, and should be fitted by someone experienced in stoma care.

Lifestyle and activity modifications

• Avoid heavy lifting — commonly interpreted as more than about 5–10 kg in the early post-operative months, though individual advice varies.
• Treat constipation promptly, with dietary fibre, adequate fluid intake and prescribed laxatives if needed.
• Manage chronic cough with medical treatment and stop smoking where relevant.
• Use correct lifting technique and avoid breath-holding under load.
• Consider a referral to a pelvic health physiotherapist for guidance on managing abdominal pressure during exercise.

Skin care, leakage and output

A prolapse changes the mechanics of the seal, and effluent that tracks under the baseplate causes irritant dermatitis quickly. Clean and dry the skin thoroughly at each change, use barrier products as advised, and change the appliance before leakage rather than after. A long prolapsed segment can pool effluent and release it in gushes, so emptying more frequently may help. A prolapsed ileostomy can occasionally lose more fluid and salt, which is worth mentioning to your team if you feel thirsty, light-headed or unusually tired.

Surgical management

When surgery is considered

• The prolapse is large, recurrent or irreducible.
• It causes significant functional impairment — obstruction, persistent leakage or skin breakdown.
• Strangulation or ischaemia occurs, which is an emergency.
• Conservative measures no longer maintain quality of life.

Surgical options

Local revision involves resecting the redundant bowel and reforming the stoma, often through a peristomal incision without entering the main abdominal cavity. It carries lower risk than a full laparotomy and has good short-term outcomes.

Stoma relocation moves the stoma to a different abdominal site with a more appropriately sized trephine and better fixation. It may be preferred when the local anatomy at the original site is unfavourable, but it is a bigger operation.

Stoma reversal or conversion — where the underlying condition permits — may be the most definitive solution. Converting a loop colostomy to an end colostomy, or reversing the stoma altogether and restoring intestinal continuity, removes the risk of further prolapse at that site.

Recurrence after surgery

Recurrence is the main limitation of all prolapse surgery, and it is common enough that surgeons counsel patients about it before operating. Local revision in particular has a noticeable recurrence rate over time, which is why reducing abdominal pressure and optimising weight and cough control afterwards matters as much as the operation itself. Relocation may lower the risk in selected patients but carries its own trade-offs. The choice depends on your overall health, your surgical history and your own priorities, and should be a shared decision between you, your surgeon and your stoma care nurse.

Living with a prolapsing stoma

A prolapsing stoma does not inevitably mean surgery or a diminished quality of life. Many people manage their prolapse successfully for years with the right appliance, technique and lifestyle adaptations.

Emotional impact

Distress at the sight of a prolapse is common and should not be underestimated. The stoma can change shape day to day, which is unsettling, and body image concerns may resurface years after surgery. Specialist counselling, clinical psychology input and peer support groups can be valuable alongside clinical care.

Review and follow-up

Regular review by a stoma care nurse is particularly important, because a prolapse changes the mechanical demands on the appliance and the peristomal skin, increasing the risk of leakage and irritant dermatitis if left unaddressed. Ask for a review if your stoma length has changed, your appliance is lasting less time, or your skin is sore.

The bottom line

Stoma prolapse is a recognised complication of stoma surgery, most common in loop colostomies, and driven by a combination of surgical technique and raised intra-abdominal pressure. Most cases can be managed conservatively with appliance adaptation, manual reduction techniques taught by a stoma care nurse, and lifestyle changes; surgery is reserved for severe or complicated presentations and carries a real chance of recurrence. Any prolapse that becomes irreducible, painful or dusky requires urgent medical assessment. Always discuss symptoms and management options with your stoma care nurse or specialist surgeon, who can tailor a plan to your individual anatomy, stoma type and daily life.