Prolapse in baby ball python. Please help??

[Sophi]

Hi,

Quick introduction...
My boyfriend works at a local pet shop and today someone came by with a baby ball python to get rid of it. He said he was leaving the state and couldn't take the snake with him. He brought all the snakes stuff with him, heat mat, day and night light bulbs, twenty long gallon tank, heat and humidity gauge and a water bowl. (a small one, big enough for the snake to drink from but probably not big enough to soak in.) he didn't have any hides at all. my boyfriend is a big softy and took the snake home at the end of his shift.

The snake is estimated at about 5-6 months old and is significantly smaller than our 7th month old ball python. He's not as large and he's absolutely not as thick. His previous owner said he was feeding on frozen thawed mice every week. We feed our girl rat pups right now so we are planning on offering him those instead as it looks like he needs to gain some weight. He also has a few stuck scales, but nothing too bad. For the most part he looks very lively and healthy. He has a lot of energy and is absolutely fine with being handled. He's a real sweet snake.

While setting up an enclosure for him and got him a hide box and we gave him a bath and noticed what looked like a prolapse on his bottom. (vent? Whatever the snake term is...) like A little red bump on his bum. He didn't have it before and after his bath it's completely dissappeared. I've been checking on him over the course of the night and it's not there anymore and he seems to be doing just fine. He's exploring his new tank and sitting by the heater.

I have a ball python, a kingsnake, lizards and geckos but I've never seen this in an animal before. I looked into it a bit but a lot of what I saw was people who's snakes have a prolapse permanently outside of them. Is it possible it wasn't a prolapse at all? Maybe it was his hemipeins? My snakes are both female so I've never seen those either.

I was thinking it could be a sign of dehydration? Especially if he hasn't had a bowl to soak in until now.

Also, how worried should I be and should I consider getting him checked out by a vet? He's been through a lot these past 24 hours and I don't want to stress him out.

To be safe I have been keeping him in a separate part of the house and he hasn't been introduced to any of my other animals.

Thank you guys.