My hamster has bite marks behind his foot

Question

ok ok hes the one who bites himself but why wut does he want i give him everything he needs water food and chewing toys he has a big cage and hes by himself please tell me wuts going on

Answer 1

u could get a rag and put water on them

 

Answer 2

He could just be bored and need something to bite or he could have a rash.