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Dr. Harsh J Shah

Why Does the Rectum Slip Out? Causes and Types

Last updated: 04-Nov-2026

Dr Harsh Shah, GI surgeon, Ahmedabad

Dr Harsh Shah
MS, MCh (Surgical Gastroenterology), DrNB (Surgical Gastroenterology)
Registered with Gujarat Medical Council, Reg. No. G-38738
GI & Proctology Surgeon
Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad · 18 years of experience

In short

The rectum slips out when its supports in the pelvis grow slack. Long-term straining, childbirth, age and weak nerves all add to the strain on those supports.

Doctors first ask whether the whole wall has come down, in rings, or only the lining, in folds. That one point decides whether it is rectal prolapse or piles.

Prolapse can also stay hidden inside the body. It is graded on a special X-ray or MRI, and treatment follows your symptoms, not the picture.

The full picture of rectal prolapse and its treatment is on our rectal prolapse surgery page. This post explains why it happens and how it is classified.

What exactly is rectal prolapse?

The rectum is the last part of the bowel. In prolapse it folds in on itself, like a sock being turned inside out, and then slides down and out through the anus.

  • It often starts inside the body, a few centimetres above the anus, while you strain.
  • Over months or years the fold can slip lower, into the anal canal.
  • In the last stage the bowel comes out of the anus and may need to be pushed back.
  • Not every internal fold goes on to come out. Many stay as they are.

What makes the rectum slip?

No single fault causes it. Several supports around the rectum grow slack together, and straining then pushes the loose bowel downward.

The pelvic supports that weaken in rectal prolapse
What weakensWhat it normally doesWhat happens when it fails
Pouch in front of the rectumStays shallowA deep pouch lets bowel press down on the rectum
Loose, long rectum and sigmoid colonIs held to the back of the pelvisThe bowel can fold and telescope
Supports at the back and sidesHold the rectum in placeThe rectum drops and turns
Pelvic floor muscle slingCloses the pelvic gap and keeps the bowel angledThe gap widens and the bowel can pass through
Anal muscle and its nervesKeep the anus closedLeaking of stool or gas, and less hold on the rectum

Each operation for prolapse aims at one or more of these faults. That is why the type of repair is matched to the person.

Who is more likely to get it?

Rectal prolapse is far more common in women, and in older people. Still, anyone who strains for years, or has certain nerve or tissue problems, can develop it.

  • Long-term constipation and straining at stool are the most common driver.
  • Pelvic floor muscles that tighten when they should relax make you strain harder. This is a common reason in young men and women.
  • Childbirth, especially several deliveries or a hard one, can injure the pelvic floor and its nerves.
  • Past womb removal or other pelvic surgery can change the support of the rectum.
  • Nerve disease, such as spinal injury, and old age with frailty loosen the muscles that hold the bowel.
  • Very loose tissues from birth, and a long cough or heavy lifting over many years, add to it.

Is it full prolapse or only piles?

The doctor looks at the pattern of the folds. Rings that go all the way round mean the whole rectal wall has come out. Folds that run like spokes mean the lining or piles.

Full prolapse compared with lining prolapse and piles
FeatureFull rectal prolapseLining prolapse or piles
FoldsRings that go all the way roundFolds like spokes of a wheel
Layers that come outAll layers of the rectal wallThe lining only
Groove around the massA groove between the mass and the anusNo deep groove
What it needsA repair that fixes the rectum in placeCare for piles or the lining, not a rectum repair

Mixing the two is a common mistake. A person sent for a prolapse repair who only has piles gets the wrong operation, and the reverse is just as wrong.

What is internal prolapse and how is it graded?

Internal prolapse is a fold of the rectum that stays inside the body. An X-ray or MRI taken while you strain shows how far it travels, and doctors grade it from one to five.

  1. Grade one and two: the fold stays high or low in the rectum, above the muscle sling. It often causes little trouble.
  2. Grade three and four: the fold reaches the top of the anal canal, or goes into it. A feeling of blockage and incomplete emptying is more likely.
  3. Grade five: the bowel comes out through the anus. This is the full, outer prolapse.

The grade guides us, but your symptoms decide. A high grade with no complaint is often left alone, while a lower grade with real blockage may need treatment.

Could it be something else?

Several problems can look like something coming down. A proper examination is needed. A growth at the tip of the mass, or a long-standing sore, must never be called a simple prolapse.

  • Piles that come out when you pass stool are a common look-alike.
  • A polyp or a growth can sit at the tip of a prolapsing rectum. A sample is taken if there is any doubt.
  • A sore on the front wall of the rectum, from long years of straining, can look like a growth.
  • Prolapse at an old bowel join or stoma needs a different repair.

In children the cause is usually different, and it often settles without an operation. Poor nutrition, long bouts of diarrhoea and worms may be behind it. So may a lung and gut condition called cystic fibrosis. A doctor should look for these.

What happens if it is left alone?

In adults, rectal prolapse rarely goes away on its own. It tends to grow. The longer it lasts, the more the anal muscle is stretched, and the more leaking you may notice.

  • Early on, it comes out only when you strain and goes back by itself.
  • Later, it comes out easily and must be pushed back with a hand.
  • When it stays out, the lining can become sore, bleed and make mucus.
  • A prolapse that cannot be pushed back, turns dark and is very painful needs care on the same day.

Frequently asked questions

Is rectal prolapse the same as piles?

No. Piles are soft cushions in the anal canal. In rectal prolapse the wall of the rectum itself slides out, often in rings. An examination tells them apart, and the treatment is different.

What causes the rectum to slip out?

Weak supports in the pelvis, long-term straining, past childbirth or pelvic surgery, and age all play a part. Nerve disease can add to it. Most people have more than one cause.

Why is it more common in women?

Childbirth can stretch the pelvic floor and its nerves, and a womb removal can change the support at the front. Women are affected far more often, but men can have it too.

Can a young person have rectal prolapse?

Yes. A young adult who strains a lot, or whose pelvic floor muscles tighten when they should relax, can develop it. Children can too, but theirs is a different problem that often settles.

What is internal prolapse?

The rectum folds in on itself inside the body and does not come out. It can cause a feeling of blockage and incomplete emptying. A special X-ray or MRI while you strain shows it.

Does every internal prolapse need an operation?

No. Many are found by chance and cause no trouble. Treatment is planned from your symptoms, not from the picture alone.

When should I see a doctor?

See one when you notice tissue coming out, leaking, bleeding or a blocked feeling. Tissue that stays out, turns dark and cannot be pushed back needs care on the same day.

Related pages

For the whole range of prolapse care, start at the rectal prolapse surgery page. For questions before you travel, call +91-63555-64601.

Where Dr Harsh Shah sees patients and operates

Dr Harsh Shah — Dr. Jivraj Mehta Hospital, Vasna, Ahmedabad
Dr. Jivraj Mehta Hospital, Dr Jivraj Mehta Marg, Vasna, Ahmedabad 380007.
Consultations, review of reports and scans, operations and follow-up. OPD Monday to Saturday, 9 am to 5 pm.
Appointments: +91-63555-64601 · +91-63590-11009 · Hospital 079-2663 6363
Directions to the hospital · WhatsApp +91-63555-64601

Is something coming out when you pass stool, and are you not sure if it is piles or something else? Bring your questions and any reports. Dr Harsh Shah will examine you and explain what is happening, step by step. Call, or send a message on WhatsApp. Call +91-63555-64601 Ask on WhatsApp

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Dr. Harsh J Shah
Dr Harsh Shah, Gastro, Cancer & Laparoscopic Surgeon, Ahmedabad
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