Ostomy Pancaking: What It Is and How to Prevent It

Pancaking is one of the most common and frustrating challenges for ostomy patients. It happens when stool collects at the top of the pouch around the stoma rather than falling to the bottom — creating a pancake-like layer that can cause leaks, skin irritation and frequent bag changes. In this guide, we cover everything you need to know about ostomy pancaking and the most effective ways to prevent it.

What Is Ostomy Pancaking?

Pancaking occurs when output sticks to the top portion of the ostomy bag instead of dropping down into the pouch body. A vacuum effect — often created by the bag's charcoal filter — pulls the pouch walls inward and traps stool around the stoma. The result: the bag looks flat and empty, but stool is actually trapped at the top, putting pressure on the baseplate seal and increasing the risk of leaks.

It is most common in people with a colostomy or ileostomy, particularly when output is thicker in consistency.

Why Does Ostomy Pancaking Happen?

• Vacuum effect from the filter: Charcoal filters absorb gas and odour. When they work too efficiently, they remove all the air from the pouch — creating a vacuum that prevents output from falling down.
• Thick stool consistency: Firmer output is more likely to stick to the pouch walls rather than slide to the bottom.
• Body position: Lying down or sitting for long periods can slow output movement within the bag.
• Pouch design: Some bag shapes don't allow output to flow freely away from the stoma.

7 Ways to Prevent Ostomy Pancaking

1. Cover the Filter

Most pouches come with small stickers designed to cover the charcoal filter. Covering it prevents the vacuum effect that causes pancaking. You can uncover it briefly to release gas, then re-cover it.

2. Add Lubricating Deodorant Drops

Pouch lubricant drops (available from Coloplast, Hollister and Convatec) coat the inside of the bag and help output slide down easily. A few drops before applying the bag makes a noticeable difference.

3. Puff Air Into the Bag

Before sealing the bag, gently blow a small amount of air into it. This breaks the vacuum and gives output space to move. Simple, free and surprisingly effective.

4. Adjust Your Diet

Increasing soluble fibre — oats, bananas, white rice — helps soften thicker output. Staying well hydrated also maintains a more fluid consistency less prone to sticking.

5. Try a Different Pouch

Some pouch shapes and lengths handle pancaking better than others. Ask your stoma nurse about longer pouches or designs with wider openings that allow freer movement of output.

6. Stay Active

Movement helps. Walking, gentle stretching or simply changing position regularly encourages output to move down through the bag.

7. Speak to Your Stoma Nurse

If pancaking is a persistent problem, your stoma care nurse can recommend changes to your appliance system. Coloplast, Hollister and Convatec all offer different solutions worth exploring.

SIIL Ostomy Belts: Keeping Your Pouch Secure and Positioned

A well-fitted ostomy belt keeps your pouch properly positioned so output can flow down as intended. SIIL's ostomy belts are made from soft, breathable fabrics designed specifically for ostomy wearers — providing gentle support without putting pressure on your stoma.

Shop SIIL Ostomy Belts →

When to See Your Healthcare Team

Occasional pancaking is common and manageable at home. But if you are experiencing it frequently — especially if it is leading to leaks, skin breakdown or frequent emergency bag changes — speak to your stoma nurse or GP. Persistent pancaking alongside skin irritation can escalate quickly if left unaddressed.

Summary

Ostomy pancaking is frustrating but very manageable. Start with the simplest fixes — covering the filter and adding lubricant drops — and work through the other strategies until you find what works for your situation. You do not have to put up with it.