This has to stop

Hi there, I have been doing this almost my entire life. I started with my fingers, I never bit them, just picked the skin off around the nails and cuticles then moved on to biting and chewing my lips and inside of my mouth (a habit that has only become worse as I've gotten older) I started picking spots when I was a teenager and subsequently picking the scabs that were formed. The affected areas have gotten progressively worse. My face (especially my nose where I get most of my spots) back, chest and legs are scarred and I have literally had enough. Sometimes I am completely unaware I'm doing it and other times I know but I either don't care or just don't have the willpower to stop. My scabs hurt in the shower and the amount of make up I have to use to cover it only perpetuates the problem. I have to stop and I have to stop now.