How to Change Your Ostomy Bag: A Step-by-Step Guide for New Ostomates in Singapore

Written by our EMIS+ nursing team — because every new ostomate deserves clear, compassionate guidance from day one.

Learning to change your ostomy bag is one of the most important skills you will develop after stoma surgery. For many patients, the first few weeks can feel overwhelming — but with the right technique, the right products, and a little practice, changing your ostomy bag becomes a straightforward part of your daily routine.

In this nurse-written guide, we walk you through exactly how to change your ostomy bag safely at home, what supplies you need, and how to keep your peristomal skin healthy and comfortable.

Understanding Your Stoma

A stoma is a surgically created opening in your abdomen that allows waste to exit your body into a collection bag called an ostomy pouch. Depending on the type of surgery, your stoma may be a colostomy (from the colon), ileostomy (from the small intestine), or urostomy (for urinary diversion). A healthy stoma appears moist, pink to red in colour, and slightly raised from the skin.

What You Need Before You Start

• Ostomy pouch system (one-piece or two-piece)
• Stoma measuring guide or template
• Scissors (curved stoma scissors if available)
• Adhesive remover wipes
• Soft wipes or gauze and warm water
• Stoma powder and barrier ring or paste if recommended by your nurse
• Disposal bag for soiled pouches

One-Piece vs Two-Piece Ostomy Systems

One-piece systems combine the skin barrier and pouch in a single unit — discreet, simple, and ideal for active lifestyles. Two-piece systems use a separate skin barrier (baseplate) and pouch that click together, allowing you to change the pouch without removing the baseplate every time.

Step-by-Step: How to Change Your Ostomy Bag

Step 1: Choose the Right Time

Change in the morning before eating or drinking, or 1–2 hours after a meal when your stoma is least active.

Step 2: Wash Your Hands

Wash thoroughly with soap and water for at least 20 seconds.

Step 3: Prepare Your New Pouch

Measure your stoma — size can change especially in the first 6–8 weeks post-surgery. Cut the barrier opening 2–3mm larger than your stoma. Warm the adhesive against your palm for 30–60 seconds before applying.

Step 4: Empty the Existing Pouch

If drainable, empty contents into the toilet before removal to reduce spillage.

Step 5: Remove the Old Pouch

Use an adhesive remover wipe and peel slowly from top to bottom, pushing down on skin with one hand while peeling with the other. Never pull sharply — this is one of the most common causes of peristomal skin damage.

Step 6: Clean the Peristomal Skin

Clean around the stoma with warm water and gauze in circular motions moving outward. Pat completely dry — the skin must be bone-dry before applying the new barrier. Moisture under the adhesive is the leading cause of poor seal and skin irritation.

Step 7: Assess Your Stoma and Skin

Pink-red stoma colour is healthy; dark purple or black requires urgent medical attention. Check peristomal skin for redness, rawness, or breakdown. Remeasure stoma if less than 8 weeks post-surgery.

Step 8: Apply Accessories if Needed

Apply stoma powder to any raw skin, press a barrier ring around the stoma opening, or apply barrier paste to fill uneven skin contours for a better seal.

Step 9: Apply the New Pouch

Centre the opening over your stoma, press firmly from the stoma outward smoothing out any creases, and hold for 30–60 seconds — body heat activates the adhesive. For two-piece systems, click the pouch onto the baseplate until secure.

Step 10: Dispose and Wash Hands

Seal the disposal bag and bin it. Wash hands again.

How Often Should You Change Your Ostomy Bag?

For one-piece drainable systems: empty 2–3 times per day and change the wafer every 3–5 days. For two-piece systems: change the baseplate every 3–5 days and the pouch as needed. Always change if you notice leakage, lifting edges, odour from the seal, or skin discomfort — do not wait for your scheduled change day.

Caring for Your Peristomal Skin

• Size the barrier correctly — the opening should be 2–3mm larger than your stoma, never smaller.
• Always use adhesive remover — never peel dry.
• Keep skin completely dry before applying the new barrier.
• Avoid creams and lotions near the stoma unless specifically designed for peristomal skin.
• In Singapore's humid climate, consider a convex barrier if your stoma is flush or retracted.

Frequently Asked Questions

Q: How do I know if my ostomy bag is leaking before I can see it?
A: Signs include unusual odour, a warm or wet feeling beneath the barrier, or stinging and itching around the stoma. Any of these mean change the bag immediately.

Q: Can I shower with my ostomy bag on?
A: Yes. Modern ostomy pouches are water-resistant. Avoid prolonged submersion such as baths or swimming unless your nurse approves.

Q: My stoma bleeds during cleaning — is this normal?
A: Minor spotting during gentle cleaning is common and usually harmless. Significant or persistent bleeding from inside the stoma requires medical assessment.

Q: How do I cut the skin barrier correctly for my stoma?
A: Use a stoma measuring guide. The opening should be 2–3mm larger than your stoma — close enough to protect skin but not touching the stoma itself.

Q: My skin is red and sore around my stoma — what should I do?
A: Check your barrier sizing. Stoma powder can help mild redness. If skin is broken or not improving within 24–48 hours, consult your stoma care nurse.

Q: Where can I buy ostomy supplies in Singapore?
A: EMIS+ stocks authentic ostomy products from Coloplast and Convatec including drainable pouches, two-piece systems, adhesive removers, barrier rings, and stoma powder. We deliver islandwide and ship across Asia.

Q: Is there support for new ostomates in Singapore?
A: Yes. EMIS+ offers free nurse consultations for product selection, fitting guidance, and technique support. You are not alone in your stoma journey.

When to Seek Professional Help

Contact your stoma care nurse or doctor if you notice: stoma colour changing to dark purple or black; stoma retraction or excessive prolapse; skin breakdown not improving within 48 hours; persistent leakage despite correct technique; severe pain; significant bleeding from inside the stoma; or no output for 4–6 hours (possible blockage, especially for ileostomates).

Shop EMIS+ Stoma Supplies

EMIS+ is Singapore's nurse-led medical supply store. We carry authentic Coloplast and Convatec products — drainable and closed pouches, two-piece systems, adhesive removers, barrier rings, stoma powder, measuring guides, and accessories. All products are 100% authentic. Discreet packaging as standard. Islandwide Singapore delivery and Asia-wide shipping.

Shop Stoma Supplies at EMIS+
New to ostomy care? Chat with our nurses — free guidance, no obligation.

Key Takeaways

• Gather all supplies before starting your bag change
• Change when your stoma is least active — ideally early morning before eating
• Always use adhesive remover — never peel dry
• Measure your stoma at every change for the first 8 weeks post-surgery
• Skin must be completely dry before applying the barrier
• Leave a 2–3mm gap between barrier opening and stoma
• Watch for stoma colour changes and skin breakdown — act early
• EMIS+ nurse consultation is free — contact us anytime

This article is written by the EMIS+ nursing team for informational purposes only. It is not a substitute for professional medical advice. Always follow the guidance of your surgeon, stoma nurse, or healthcare provider.