Topic Explanation:
The forum topic discusses the changes in stoma size, particularly the retraction and protrusion of the stoma in different positions, following a recent surgery to change the type of ostomy.

Replies - Advice and Insights:
- Stoma size can change depending on various factors such as position, temperature, and activity level.
- Cold and compression can cause the stoma to become smaller.
- Stoma may retract and become smaller when lying down and protrude more when standing or sitting, which is considered normal.
- Stoma size can fluctuate throughout the day, depending on its activity level.
- It is common for the stoma to change size, becoming smaller when it's working and larger when it's getting ready to work.
- The changes in stoma size are considered normal and not necessarily a cause for concern.
- The experience of stoma size changes can vary from person to person, and it is important to pay attention to individual patterns and consult a healthcare professional if there are concerns about retraction.

Conclusion:
The forum discussion provides reassurance that changes in stoma size, including retraction and protrusion, are common and normal occurrences. It also emphasizes the importance of individual observation and seeking medical advice if there are concerns about stoma retraction.