It is normal to eat dead skin?
Ever since I was a kid I've always had a habit and it always had something to do with eating. I used to bite and eat my finger nails. The habit I have now is to itch and eat the scabs and dead skin on my scalp. I know it sounds gross but I just can't stop. I always end up doing it unconsciously. I really want to know what is causing me to do this. Please help. Thanks