I'm not really sure why I do it? But I seem to do it really often. When I was younger I remember I did it. But now I've been doing it a lot. I like to bite my top lip a lot. In the same exact spot. And then I get this like blister/bump thing on my top lip..Like if I scrunch my lips to pretend to kiss something.. you can visually see it. And it's disgusting. My girlfriend would say that's gross don't do that or stop biting your lip then. I find it almost addicting though. I get this really good sensation when I bit it. It feels so good and relieving. I'll bite and pull it. Lick it. Use my fingers and pinch it. It's never like bled or anything to that extent. It's just this thing on my top lip that I don't know what it is..it's probably from the biting and picking..I don't know how to stop because it's really relieving and soothing. I do it really often. I'm at work right now and I can't stop biting and picking with my fingers. I feel embarrassed...because I feel like I look weird when I'm doing it near my coworkers. How do I stop this behavior? Is this a compulsion?