I have a juvenile ball, 376 grams and about 18 inches. He hasn't eaten for a month and has recurring swelling near his tail but I can't feel any hard lumps. he switched to adult mice 7/22 and had bowel movements for two months afterwards. Last bowel was 9/18 and last meal was 10/4 and has refused every week since. My adult ball will go up to six weeks without pooping so I wasn't too worried until last week when I noticed the swelling. I soaked him in lukewarm water and the next day he urinated a lot of liquid and the swelling was gone. but it came back, comes and goes, still won't eat. Today I noticed what looks like it may be a prolapse beginning, the vent is slightly open and I can see pink. I will call my vet tomorrow for an emergency appointment but wondering if there is anythign I can or should do in the meantime to make him more comfortable.

I am attaching some pictures. It looks like the swelling is less between the time I had him out earlier and when I took pictures, but the part before the tail end is the same width as the body instead of tapering down.

Thank you for any suggestions