Try sprinkling some brown sugar on your stoma to return it to it's original length - yes, it does work and is recommended by a lot of ostomy nurses.
Prolapses aren't dangerous, just annoying esp if they interfere with bag adhesion and/or it's persistant. To surgically fix it is usually a simple procedure of stitching the stoma properly to the abdominal wall so it can't slide back out again.
I have had an ileostomy for 33 years now due to UC.
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