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What Is a Colostomy Bag?

A colostomy bag is a pouching device that collects stool from a stoma on the abdomen. A stoma is an opening created during colostomy surgery that brings part of the colon to the surface of the skin. Stool exits through the stoma into the bag instead of passing through the rectum in the usual way. Colostomy bags may be used temporarily or permanently depending on the condition and surgery.

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What Is a Colostomy Bag?

A colostomy bag is a pouching device that collects stool from a stoma on the abdomen. A stoma is an opening created during colostomy surgery that brings part of the colon to the surface of the skin. Stool exits through the stoma into the bag instead of passing through the rectum in the usual way. Colostomy bags may be used temporarily or permanently depending on the condition and surgery.

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What Is a Colostomy Bag Used For?

A colostomy bag is used after surgery redirects the colon to an abdominal stoma. It collects stool and gas while protecting the skin around the stoma. A colostomy may be needed for colorectal cancer, bowel injury, diverticulitis, inflammatory bowel disease, obstruction, birth differences, or other conditions. The pouching system helps the person manage waste discreetly during daily activities.

Types of Colostomy Bags

Colostomy pouching systems can be one-piece or two-piece. A one-piece system has the skin barrier and pouch attached together, while a two-piece system has a separate barrier and removable pouch. Pouches can be drainable, closed-end, filtered, transparent, opaque, flat, or convex depending on needs. An ostomy nurse helps choose the system that fits the stoma, skin, stool consistency, and lifestyle.

How Is a Colostomy Bag Used?

The pouching system is placed over the stoma so stool drains into the bag. The skin barrier should fit closely around the stoma without squeezing it. Drainable bags are emptied when partly full, while closed-end pouches are removed and discarded after use. The system is changed on a schedule based on the product, skin condition, leakage, and output.

Skin Care and Safety

Good colostomy bag care helps prevent leaks, odor, and skin irritation. The skin around the stoma should be cleaned gently and checked for redness, breakdown, or rash during changes. A poor seal, wrong opening size, creases, or overfilled pouch can cause leakage. Bleeding from the stoma, severe skin breakdown, black or pale stoma color, no output with pain, fever, or vomiting should be reported promptly.

FAQs About Colostomy Bags

Can a colostomy bag smell?

A properly sealed pouch should control odor most of the time. Odor may occur during emptying, leakage, poor seal, or certain foods.

How often is a colostomy bag changed?

The schedule depends on the pouching system, output, skin condition, and product instructions. An ostomy nurse can help set a routine.

Can you shower with a colostomy bag?

Many people can shower with or without the pouch depending on comfort and care instructions. The pouching system should be checked afterward for seal security.

Is a colostomy bag permanent?

It can be temporary or permanent. The answer depends on the reason for the colostomy and whether bowel reconnection is possible later.

References

Colostomy: What It Is, Bags, Surgery, Types & Care. Cleveland Clinic. https://my.clevelandclinic.org/health/procedures/22100-colostomy. Date Accessed June 18, 2026.

Ostomy: What It Is, Surgery, What To Expect & Bag Care. Cleveland Clinic. https://my.clevelandclinic.org/health/procedures/22496-ostomy. Date Accessed June 18, 2026.

What Is an Ostomy? United Ostomy Associations of America. https://www.ostomy.org/what-is-an-ostomy/. Date Accessed June 18, 2026.

Caring for Your Ileostomy or Colostomy. Memorial Sloan Kettering Cancer Center. https://www.mskcc.org/cancer-care/patient-education/caring-for-your-ileostomy-colostomy. Date Accessed June 18, 2026.

Diet Guidelines for People With a Colostomy. Memorial Sloan Kettering Cancer Center. https://www.mskcc.org/cancer-care/patient-education/diet-guidelines-people-colostomy. Date Accessed June 18, 2026.