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Hi everyone I have been picking my thumbs for as long as I can remember. Sometimes it gets so basically that the wound on my thumbs connect at the bottom. I use a pocket knife to trim off the skin is can't get with my finger nails and pick until my thumbs are a red raw and sore mess. It gets painful to bend my thumbs at times and it's hideous, however I can't stop no matter what I try. Can anyone give me advice how to stop?