looks like a small prolapse first i've ever seen other then pix in books at least it don't look that bad (still can be fatal if I'm not mistaken) seen one way worse then that over at mvp forum of a green tree python. but the guy got lucky and it retracted back in by itself a few hours after happening
i may be mistaken but isn't prolapse usually caused by over feeding or dehydrated or a combo of the 2. i know green tree pythons are prone to them first i've seen of a ball python getting one (but i aint looking for ball pythons with prolapse either)