I've never seen it but I have read and heard of several types of "kinks" that can affect the appearance of a snake. Take a look at this thread from Ball Python forum. It's by no means limited to pythons -- I was originally looking for a thread I found a while back on kinking in kingsnakes but found this instead. I think the basic gist is that it may be genetic, the result of an injury, or the result of various vitamin deficiencies (I don' know if your snake was born with it or if it recently developed). My impressions is that as long as the snake does not appear to be in pain or is suffering that it shouldn't be too much of a problem but I'm really no expert on this matter. Everything I know about kinked snakes I learned on kingsnake.com:
Genetic Kinking

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