This topic is about a sudden change in the appearance of a 2-year-old colostomy stoma, which has become swollen and mushroom-shaped. The person is seeking advice on what might have caused this and how to return the stoma to its normal size to apply a new wafer. Here are some helpful insights and advice:

1. Normal size changes:
- Stomas can naturally enlarge and shrink, similar to "breathing," changing from the size of a coin to a golf ball. Often, waiting a short time allows it to retract enough to place a wafer.

2. Sugar application:
- Sprinkling granulated sugar directly on a swollen stoma is a known method to draw out fluid and reduce swelling. After applying, rinse with water. This method has worked for many, though not everyone sees a difference. It won't affect blood sugar levels.

3. Cooling and gentle handling:
- Taking a shower or gently wiping the stoma with toilet paper can help reduce swelling. Lying on your back, gently massaging the abdomen, and doing slow breathing exercises that pull the lower abdomen toward the chest may also help the stoma retract.

4. Check for partial obstruction:
- Consider if any food might be stuck, as certain foods like nuts (especially almonds or cashews) and popcorn can cause temporary swelling for a few days. Opt for less oily nuts like peanuts or pistachios and chew them thoroughly.

5. Appliance fit and product suggestions:
- Tight cut-to-fit wafers can constrict a stoma. Consider using Convatec Natura Moldable wafers, which can be stretched slightly larger than the stoma and then "hug" it when warmed on the body, reducing leakage and skin trauma.
- Hollister Adapt Barrier Rings and Brava Elastic Tape XL by Coloplast can provide extra security. Other options include Coloplast Moldable Ring and Hollister CeraRing.
- A flange belt or abdominal binder/wrap can help keep the stoma closer to the skin and limit prolapse.

6. Pouch considerations:
- Some people find Convatec’s newer tan cloth-backed pouch stays damp after a shower and irritates the skin. Switching to the all-plastic Convatec 404032 pouch or another plastic-backed style can prevent this. Desitin diaper cream can help heal irritated skin.

7. When to seek help:
- If the prolapse persists or worsens, or if there is pain or a suspected obstruction, it is important to seek assessment by an ostomy or wound-care nurse.

8. Other resources:
- You can search OstoAI for additional tips and information.