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Why a colostomy is done

Reasons for having a colostomy

A colostomy may be done when part of your large bowel (colon), rectum or anus needs to be removed or rested after surgery.

A colostomy may be needed because of:

  • a growth in the large bowel, such as bowel cancer or bowel polyps
  • a bowel condition, such as inflammatory bowel disease
  • infection, such as diverticulitis, or an abscess
  • a bowel obstruction, when your bowel becomes blocked so poo cannot move through it
  • not enough blood getting to your bowel, for example, ischaemic bowel disease
  • your large bowel becoming very swollen
  • injury to your bowel, or injury to your spinal cord or nerves, which means you cannot control when you poo (bowel incontinence)

Depending on why you're having it, a colostomy may be permanent, or temporary and reversed later. A reversal is where your bowel is joined back together inside your tummy.

Page last reviewed: 18 December 2024
Next review due: 18 December 2027