New here, need help

Hi, I just joined here at the recommendation of a friend. I am 19 years old and I have been picking my fingers since my teens, as far as I can remember. I pick my fingers and eat the skin, I pick my nails and chew on them. I pick them to serious bleeding. More often than not I have to wear bandaids. I am addicted to the pain. When it gets so bad I can't function or sleep, I put bandaids around them really tight so that I can't feel it as much. But...if I don't feel the pain I feel like I need to, if that makes sense. I do it anywhere, home, work, with friends. I used to pick my scabs. I don't get too many scabs anymore, but I know I would pick them if I got them more. I have tried numerous times to stop. Quite often, I succeed for a few weeks - even months at a time. I use clear nail polish to strengthen and nourish my nails. My hands start to look normal and then...I don't know what happens!!!!!!! I binge without even knowing it! In one day my hands are disgusting things again! This has been a cycle for years. What do I do?