HELP! STOP CHEWING CUTICLES!?

okay so I've had this horrible habit of biting my fingernails and the skin around my nail. The skin around my nail is so bad it has even bled in the past! sometimes they hurt!!! I need a way to stop for sure!! I tried will power, worked for about a week. I don't know what to do!! ANswers should be about my cuticles, not nails. But if you have tips for both thats awesome. Please help!!! Thanks!