I got into the habit of picking at my skin years ago. A couple things helped me stop. First, i bought a first aid spray at the drug store. I was much less inclined to pick at my sores after i'd sprayed them. The second was to get some bubble wrap and attach a swatch of it to my shirt with a safety pin when i was home and burst a bubble when i felt eager to pick at my skin. Hope this helps someone, it worked wonders for me. There's a support site for skin picking, called dermatotillomania, called 'pickaderms.' Not sure if it's still there.