my snake has a swollen tale at the end. not to sure why. he can move the very end and the upper part but around his bum section its swollen. when we touch it hes not in any pain at all. how can we treat it. he also managed to cut himself in top of where the swollen part is but its healed now. his poo is also like a green liquid form its not solid in any form what so ever. but he's moving. we have feed him, but he's not wrapping the mice at all hes just eating it. also the smell in his tank smells like acid.