A colostomy bag, also known as an ostomy bag or pouch, is a medical device used to collect fecal waste from a stoma. A stoma is an opening on the abdominal wall that is created during a colostomy surgery. The stoma is a way for waste to leave the body when the colon or rectum is unable to function normally.

The colostomy bag is attached to the stoma and securely collects the waste. These bags are designed to be leak-proof and discreet, allowing people to go about their daily activities without any interruption. The bags typically have a clip or adhesive to help keep them in place, and can be emptied and changed regularly for hygiene purposes.

Colostomy bags are often used temporarily or permanently by people who have undergone surgery for medical conditions such as colon cancer, inflammatory bowel disease, or diverticulitis. While it may take some time for patients to adjust to the change of having a colostomy bag, counseling and support from a healthcare professional can make the transition easier.