Dermatillomania

I've been picking different areas of my body (starting with my fingers) ever since I was six years old. I remember starting it from the anxiety that came with the situation between my biological DNA donors and the custody agreement they had. When I started getting older, I would get infected toes, and the step monster would be squeezing on the painful area while todd would hold me stiffly and try to talk me through it (which didn't always work).

I've been trying to quit this habit for almost 23 years. I guess I'm doing better now than before, even in recent years. Why does it feel like I'll never quite get there, then?