Do Hedgehogs bite?

Generally, they are very timid indeed and do not bite except in extreme self-defence. 

If they can't protect themselves by closing into a ball.

Females may bite males to avoid overly persistent courtship, or to defend their little hoglets from possible predators (including humans).

Males may bite other hedgehogs if they approach "their" female, or "their" meal especially in times when they are hungry and if food is in short supply.