I'm not sure I can offer any real help. I do the same thing. I can't stand scabs so I am always picking at them, even though, I'm making things worse. I have done this since I was a small child. It was really bad when I was a teenager with acne. Now that I'm past that I don't have as many to scratch. It takes great strength to over come this because it has be come a habit. Try putting bandaids over injures to help remind you to not scratch. Distract yourself by finding something to do with your hands like painting, crochet, draw, etc. You can't scratch if your hands are busy. Hope this helps a little.
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Bipolar I, Depression, GAD Meds: Zoloft, Zyprexa, Ritalin
"Each morning we are born again. What we do today is what matters most." -Buddha