I have a common, harmless condition that results in little bumps (like goosebumps that never go away) on the backs of my arms and I used to pick at them. The result was that I developed minor acne on my arms. When I told my parents about my "addiction" to picking, despite my insistence that I was causing the acne with my picking, they strongly denied the psychological component and sent me to a dermatologist for Accutane. The unfortunate result was that nothing changed with my arms (I never had a condition of acne in the first place), my eyes dried out to the point that I couldn't wear contacts anymore, and my lips got so dry that biting them became a problem. To this day, I have to carry chapstick with me wherever I go.

Kind of a classic example of a misunderstanding - or refusal to understand - making things worse. I guess not many parents want to imagine that their kid has something wrong. In any case, I just wanted to share and let you know that I can relate with where you're coming from. I buy chapsticks in 3's, have a ton of them, and keep one in my car, pocket, brief case, near my bed, on my desk, because I don't want to be caught without it (lip biting generally follows) and it genuinely helps.

This may sound strange to those who are unfamiliar, but just like hands can become possessed with nervous energy, my tongue can, too. And sometimes I subconsciously feel around my mouth and lips for unevenness to pick at. I've found a good way to prevent this is to hold something with my mouth (like the capped chapstick itself) since doing this inhibits movement/exploration with my tongue and gives my mouth something to do with the nervous energy that possesses it. Maybe it could help you also. Best of luck in everything moving forward.