Since you already have advise about the prolapse, I wanted to chime in about the nose bump.

One of my adult boas was being kept in a temporary tub and the humidity was getting too high. I never saw any abrasions on his nose but in a few days his nose swelled up just like that. I took him to the vet and it turned out he had been rubbing his nose and ended up with an infected tooth. It required surgery and I had to give him shots of antibiotics for the next week and a half. If I had left it untreated, the infectiong could spread and would have killed him. He's all better now but his nose stayed slightly mishapen because of it. I suggest getting that boa to a vet asap.
Good luck!
-April
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'There is a very fine line between "hobby" and "mental illness."' -Rainshadow

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