Colostomy Reversal: What to Expect

A colostomy reversal reconnects the large bowel so stool can leave the body through the anus and the stoma can be closed. It is considered only when a colostomy was intended to be temporary, the remaining bowel has healed, and you are fit enough for another operation. Bowel habits often change afterwards, and not everyone is a candidate. Discuss timing, risks and likely function with your stoma care nurse or surgeon.

Who is offered a colostomy reversal

A colostomy is reversed only when the original operation was meant to be temporary, or when later review shows that the remaining bowel, anus and sphincters can reasonably work together again. Temporary colostomies are used after emergency surgery for obstruction, perforation or diverticulitis (including a Hartmann’s procedure), to protect a join after rectal surgery, or to rest inflamed or injured bowel.

Reversal is never automatic. The team considers the length and condition of remaining colon and rectum, sphincter strength, previous pelvic radiotherapy, residual or metastatic cancer, other illnesses, medicines that affect healing, and your own priorities. People who were first told a stoma would be temporary may later be advised that closure would be unsafe or would leave poor continence. Electing to keep a manageable colostomy is a legitimate choice.

Your colorectal surgeon and stoma care nurse should explain whether reversal is on the table and what bowel control is likely to be like if it goes ahead.

Timing and preoperative assessment

No single waiting time fits everyone. Many services delay until the abdomen has healed, weight and nutrition have improved, and any chemotherapy or radiotherapy has finished — often several months, sometimes longer. Studies comparing earlier and later reversal report mixed results, so the date is individualised rather than dictated by a fixed rule.

Fitness work before surgery matters. Stopping smoking, building walking tolerance, reviewing blood-thinning and steroid medicines, and treating anaemia or malnutrition all lower risk. Your stoma care nurse can talk through realistic function after closure and help you plan support at home and time away from work.

Investigations

Teams usually confirm that the unused downstream bowel is open and healthy. That may mean a contrast enema, a CT scan, or an endoscopic look at the rectum or remaining colon. Sphincter tests are sometimes added after obstetric injury, incontinence or pelvic radiotherapy. An anaesthetic assessment reviews heart and lung fitness. Clear tests do not guarantee a smooth recovery, but they reduce the chance of operating when a join would be unsafe.

What happens during the operation

Reversal is done under general anaesthetic. The approach depends on the original stoma.

A loop colostomy is often closed through the stoma opening itself: the two limbs are joined (an anastomosis) and the bowel is returned to the abdomen. An end colostomy after Hartmann’s surgery is a bigger undertaking. The rectal stump must be found, the colon brought down to meet it, and a new join created, sometimes through an open incision and sometimes with a laparoscopic (keyhole) approach. Scar tissue from the first operation can make this slow.

The hole in the abdominal wall is closed in layers. A drain is not always required. A urinary catheter is common for a short period. Operating time ranges from under an hour for a straightforward loop closure to several hours for a complex Hartmann’s reversal.

Recovery in hospital

Expect abdominal pain that is managed with a planned combination of pain relief; ask early rather than waiting until discomfort is severe. Sitting out of bed and walking on the day of surgery or the next day reduces clots and chest infection. Wind and then stool may return within a few days, or the bowel may be sluggish (ileus). Drinking and light meals usually restart as you tolerate them. There is no universal feeding schedule.

Stays are often a few days after loop closure and longer after more extensive surgery, but this varies widely. Before you leave, you should know how to look after the wound, which symptoms need urgent review, and whom to telephone. The former stoma site does not need a bag; it does need to be kept clean and dry as advised by the ward team or stoma care nurse.

Bowel function after reversal

Bowel that has been unused, and sphincters that have not worked for months, often take time to settle. Frequent loose stools, urgency and a sense of incomplete emptying are common in the early weeks. Night-time toilet trips are not unusual. Function typically improves over months, yet the new pattern may never match life before the original illness.

The perianal skin can become sore from wetter, more frequent stool. Gentle washing, patting dry, and barrier protection suggested by your nurse are usual first steps. Pelvic floor physiotherapy helps some people. Clinicians may discuss stool-bulking, anti-diarrhoeal medicine or toilet-timing strategies; do not start or stop prescription treatments without personal advice.

Low anterior resection syndrome and sphincter control

When the rectum has been operated on, a recognised cluster of symptoms called low anterior resection syndrome (LARS) may persist: clustering of bowel motions, urgency, variable leakage and difficulty with wind. Pelvic radiotherapy raises that risk. LARS is not a personal failing. Colorectal and pelvic floor services can assess and support you. A minority of people find control so poor that another stoma is later considered. Honest counselling about that possibility is part of informed consent.

Risks, complications and warning signs

Reversal carries the usual risks of abdominal surgery plus problems related to the new join. Anastomotic leak can cause severe pain, fever and a fast pulse and needs emergency assessment. Other issues include abscess, wound infection or breakdown, bleeding, blockage from adhesions, and blood clots. A hernia at the old stoma site is relatively common over the following months and years.

Seek urgent care for worsening abdominal pain, high fever, vomiting that stops you keeping fluids down, heavy rectal bleeding, a wound that opens or pours pus, a swollen painful calf, or sudden shortness of breath. For slower problems such as poor control, mild wound redness or questions about activity, contact your surgical team or stoma care nurse.

A follow-up visit is usual. If the colostomy related to cancer or inflammatory bowel disease, closing the stoma does not cancel surveillance or medicines already planned; ask how that follow-up will continue.

The bottom line

Colostomy reversal can restore passing stool through the anus, but it is further surgery with genuine risks and a period of unpredictable bowel habit. Not everyone is suitable, and a permanent stoma may be safer or more acceptable. Make the decision with your colorectal surgeon and stoma care nurse, expect an adjustment rather than an instant return to ‘normal’, and seek prompt advice if recovery does not feel right.