Ostomy Pancaking: How to Prevent It — UK Stoma Guide 2026

Pancaking is one of the most common challenges faced by stoma patients in the UK. It happens when stool collects at the top of the stoma bag rather than dropping to the bottom — creating a flat, pancake-like layer around the stoma. The result is increased risk of leaks, peristomal skin irritation and the need for more frequent bag changes. This guide explains why pancaking happens and how to prevent it, with practical advice for UK stoma wearers.

What Is Stoma Pancaking?

Pancaking occurs when output sticks to the top of the stoma bag rather than falling downwards. A vacuum — typically created by the bag's charcoal filter — pulls the pouch walls inward and traps stool around the stoma. The bag appears flat and empty, but output is actually concentrated at the top, pressing against the baseplate and risking a leak or blowout.

It is most common among people with a colostomy or ileostomy, especially when stool is of a firmer consistency.

Why Does Pancaking Happen?

• Vacuum from the charcoal filter: Stoma bag filters absorb gas and odour. When they absorb too much air, they create a vacuum that prevents output from dropping to the bottom of the bag.
• Thick stool consistency: Firmer stools are more likely to adhere to the pouch walls rather than falling freely.
• Position: Prolonged sitting or lying can slow the movement of output within the bag.
• Pouch design: Some bags are more prone to pancaking due to their shape and filter position.

7 Effective Ways to Prevent Stoma Pancaking

1. Cover the Filter

Most stoma pouches come with small stickers to cover the charcoal filter. Covering it prevents the vacuum that causes pancaking. Remove the sticker briefly to release wind, then re-cover it. Simple and very effective.

2. Use Lubricating Deodorant Drops

Pouch lubricant drops from brands such as Coloplast (Aloe Vera Lubricating Deodorant), Hollister and Convatec coat the inside of the bag so output slides down more easily. A few drops before fitting the bag can make a significant difference. These are available on NHS prescription in many areas — ask your stoma nurse.

3. Inflate the Bag Before Use

Before fitting your pouch, gently blow a small breath of air into it. This breaks the vacuum before it forms and gives output room to move. It costs nothing and takes seconds.

4. Adjust Your Diet

Increasing soluble fibre — oats, bananas, white rice, boiled potatoes — can help soften thicker output. Drinking plenty of fluids also helps maintain a consistency less prone to sticking. Your stoma nurse or NHS dietitian can provide tailored dietary advice.

5. Try a Different Pouch

Some pouches handle pancaking better than others. Longer pouches or those with wider flange openings allow output to flow more freely. Ask your NHS stoma nurse about switching brands or models — most can arrange free samples.

6. Keep Moving

Regular movement — walking, gentle exercise or simply changing position throughout the day — encourages output to move down through the bag rather than collecting at the top.

7. Talk to Your NHS Stoma Nurse

If pancaking is a recurring problem, your NHS stoma nurse is your best first point of contact. They can review your entire appliance system and recommend alternative products. You can also contact Colostomy UK (0800 328 4257) or the Ileostomy and Internal Pouch Association helpline (0800 018 4724) for free, confidential support.

SIIL Stoma Belts: Supporting Your Pouch the Right Way

A well-fitted stoma belt keeps your pouch correctly positioned and helps output flow down as intended. SIIL's stoma belts are made from soft, breathable fabrics developed specifically for stoma wearers — offering gentle, comfortable support without putting pressure on your stoma or the surrounding skin.

Shop SIIL Stoma Belts UK →

When to Contact Your Healthcare Team

Occasional pancaking is manageable at home. However, if you are experiencing frequent leaks, skin breakdown or significant distress, contact your stoma nurse or GP promptly. Do not wait — persistent pancaking alongside skin irritation can escalate quickly if left unaddressed.

Summary

Stoma pancaking is frustrating but very much manageable. Start with covering the filter and adding lubricant drops, then work through the other strategies to find what works best for you. With the right approach, you can minimise pancaking and get back to living confidently with your stoma.