To change an ostomy bag, gather your supplies, empty the pouch if it is drainable, then peel the old wafer off slowly while supporting your skin. Wash the area with plain warm water and dry it fully, measure your stoma, cut or shape the new wafer to fit, add a barrier ring if you use one, then press the warm wafer onto dry skin and hold it in place. A calm, unhurried change on clean, dry skin is what keeps the seal leak-free, so give yourself ten quiet minutes rather than rushing it. Below is the full routine, step by step, written for your first changes.
In this article
- How often should you change an ostomy bag?
- What you need to change an ostomy bag
- How to change an ostomy bag, step by step
- One-piece or two-piece: does the routine change?
- Common beginner mistakes to avoid
- Frequently asked questions
Changing your pouch for the first time can feel daunting, and that is completely normal. The good news is that it becomes routine fast, usually within a few weeks. Most people settle into a rhythm they can do half-asleep before their morning coffee. The steps below are the same ones an ostomy nurse would teach you, broken down so nothing gets missed.
How often should you change an ostomy bag?
Most people change their full ostomy system every 3 to 7 days, and empty a drainable pouch several times a day in between. A colostomy barrier often lasts the full week, an ileostomy usually needs changing every 3 to 4 days, and a urostomy tends to fall in the 3 to 5 day range. The right number is the one that keeps your skin healthy and your seal sound, so let your own body set the schedule rather than a calendar alone.
Change sooner, the same day, if you notice itching or burning under the wafer, if you can see output creeping toward the edge, or if the barrier starts to lift or feel loose. Those are signs the seal is failing, and waiting only risks a leak and sore skin. For more on this, see our guide to how long an ostomy wafer lasts.
What you need to change an ostomy bag
Set everything out within reach before you remove the old pouch, so you are never holding an open stoma while you hunt for scissors. A basic change kit is short:
- A new pouch and wafer (or a fresh one-piece system).
- A measuring guide and curved scissors if you cut your own opening.
- Warm water and a soft cloth or plain gauze. Skip wipes with oils, lotions, or alcohol, since any film stops the adhesive bonding.
- A barrier ring if you use one, to seal gaps and protect the skin.
- A small trash bag for the used pouch, and a clean towel to work on.
- Optional extras: an adhesive remover wipe, a skin barrier wipe, and pouch deodorant.
Many people keep a ready-made kit in a drawer and a smaller version in a bag for changes away from home, so a surprise leak never catches them empty-handed.
How to change an ostomy bag, step by step
Step 1: Wash your hands and get comfortable
Wash your hands well and find a spot where you can see clearly, standing at a mirror or sitting down, whichever feels steadier. Changing in the bathroom is easiest for cleanup. Take your time. A relaxed change on dry skin holds far better than a rushed one.
Step 2: Empty the pouch first
If you have a drainable pouch, empty it before you remove anything, so you are not handling a full bag. A closed pouch can be removed as is. Emptying first keeps the change tidy and lowers the chance of a spill on your skin or clothes.
Step 3: Remove the old wafer gently
Starting at the top, peel the wafer away from your skin slowly, pressing your skin down and away from the adhesive with your other hand rather than yanking the wafer up. This push-pull method protects your skin from stripping. An adhesive remover wipe makes this easier and far gentler, especially in the first weeks while your skin adjusts. Removing it low and slow is one of the best habits you can build.
Step 4: Clean the skin with plain water
Wash the skin around your stoma with warm water and a soft cloth or gauze. Plain water is all you need. Avoid soaps with moisturizers, oils, or fragrance, because they leave a residue the next wafer cannot grip. It is normal to see a little bleeding from the stoma itself when you clean it, since it has a rich blood supply, and that is nothing to worry about.
Step 5: Dry the skin completely, then check it
Pat the area fully dry. Hydrocolloid adhesive will not bond to damp skin, so this step quietly decides whether your seal lasts a day or a week. While the skin is bare, take a few seconds to look it over. Healthy peristomal skin (the skin around your stoma) looks like the skin elsewhere on your body. Redness, a rash, or soreness is a sign to act early, and our guide to stopping peristomal skin irritation walks through the fix.
Step 6: Measure your stoma and size the opening
Measure your stoma with the guide that comes with your supplies, then cut or mold the wafer opening to match, leaving a gap of about one eighth of an inch (3 mm) all the way around. Snug, not tight. An opening that is too big lets output reach your skin, the number one cause of leaks. One that is too small can rub and swell the stoma. Your stoma shrinks for several weeks after surgery, so measure at every change early on rather than assuming last week's size still fits. If you use pre-cut or moldable wafers, just pick or shape the matching size.
Step 7: Add a barrier ring for a tighter seal
If your skin is uneven, creased, or your stoma sits flat, a barrier ring fills the gaps a flat wafer cannot reach. Warm the ring briefly in your hands, stretch and mold it to your opening, and place it around the stoma. It works like a soft gasket, so output goes into the pouch instead of under the seal. Rings with ceramide also help protect the skin underneath while they seal. New to these? Start with what an ostomy barrier ring is and how it works.
Moldable hydrocolloid rings with ceramide. They fill creases for a tighter, longer-lasting seal and support the skin around your stoma. FSA and HSA eligible.
If you would rather start with a softer, lower-cost ring while you learn your routine, SoftFlex does the same molding job without the ceramide.
A soft, flexible ring that molds easily for a secure seal. A simple, affordable place to start. FSA and HSA eligible.
Step 8: Apply the new wafer and press to seal
Warm the wafer between your hands first, since a warm hydrocolloid molds to your body and grips better. Center the opening over your stoma, press the wafer onto dry skin from the stoma outward, smoothing out any wrinkles. Then hold your warm hand flat over it for 30 to 60 seconds. That gentle heat and pressure activates the adhesive and is one of the most overlooked steps in a lasting seal.
Step 9: Attach the pouch, add deodorant, and check the seal
On a two-piece system, snap or stick the pouch onto the wafer flange and tug it gently to confirm it is locked on. On a one-piece, the pouch is already attached. This is the moment to add a lubricating pouch deodorant, which controls odor inside the bag and helps output slide to the bottom so emptying is cleaner. Run a finger around the whole edge to check it is flat and sealed, close the drain, wash your hands, and you are done.
Single-use packets that neutralize odor in the pouch and coat the walls so output slides down. Clear, non-staining, and easy to carry. FSA and HSA eligible.
One-piece or two-piece: does the routine change?
The skin steps are identical. The only difference is how the pouch and wafer go together.
| One-piece system | Two-piece system | |
|---|---|---|
| How it works | Pouch and wafer are joined as one unit | Wafer sticks to skin, pouch clips or sticks onto it |
| Changing the pouch | Whole system comes off together | Swap just the pouch and leave the wafer on |
| Best for | A lower profile under clothing and simplicity | Fewer skin changes and easy pouch swaps |
Neither is better, only different. Your ostomy nurse usually starts you on one, and you can try the other later to see what suits your skin and your day.
Common beginner mistakes to avoid
- Applying to damp skin. The most common reason a seal fails early. Dry fully every time.
- Cutting the opening too large. Measure each change in the early weeks and keep the gap to about 3 mm.
- Ripping the wafer off. Peel slow and push the skin down, or use a remover wipe, to protect your skin.
- Skipping the warm-and-press step. Thirty seconds of hand pressure is what locks the adhesive in.
- Waiting too long to change. Itching or a lifting edge means change now, not tomorrow. Leaks are the main thing to head off, and our guide to why an ostomy wafer keeps leaking covers the rest.
Frequently asked questions
How long does it take to change an ostomy bag?
A full change usually takes 10 to 15 minutes once you find your routine, and often less. Your first few will take longer, and that is fine. Emptying a drainable pouch in between takes only a minute or two.
Does changing an ostomy bag hurt?
It should not hurt. Removing the wafer can tug a little, which is why peeling slowly or using an adhesive remover wipe helps. The stoma itself has no pain nerves, so touching or cleaning it does not hurt, though it may bleed slightly, and that is harmless. Pain, burning, or raw skin is a sign to check your fit and seal, not something to push through.
What is the best time of day to change an ostomy bag?
First thing in the morning, before eating or drinking, is the most popular choice because the stoma is least active then, which keeps the change cleaner. Pick a consistent time that fits your day, since a routine is easier to keep than a random schedule.
Can I shower with my ostomy bag off during a change?
Yes. Water will not harm your stoma, and many people like to shower with the system off on change day, then dry fully and apply a fresh one. Keep harsh soap and the direct spray off the stoma, and rinse with plain water.
Do I need a barrier ring every time?
Not everyone does. If your skin is flat and even and your seal holds well, a wafer alone may be enough. If you get leaks, have creases or scars near the stoma, or your stoma sits flat, a barrier ring fills those gaps and often solves the problem.
Build your change kit in one place
Barrier rings, deodorant, and the supplies that make every change calmer and leak-free, from trusted brands like Hollister.
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This guide is general education, not medical advice. Your stoma care nurse can tailor a routine to your stoma and skin. For more support, the United Ostomy Associations of America (UOAA) offers free, trusted resources.