baby Corn Snake

Question
Today I bought a baby corn snake from a reptile shop, when we got it home we realized it had a dent on the upper part of its body it moves its head but cant seem to move the rest of its body below that dent? THANK YOU FOR HELPING.

Answer
I'd return it.  While it is probably just a birth-defect that may not cause any problems (what you describe is common in corns), it does affect it's value.  It is not "perfect" and therefore should not be bred.  If it really can't move below the lump then the snake may not live for very long anyway.