This is strange but

I have had issues with depression and anxiety for years. I have always had the urge to self harm. Always. But instead of picking up a knife like my urges say, i have been picking at scabs. I feel more satisfied when they hurt. I have recently moved on to my arms and legs. It has gotten to the point of ways being self conscious (although i usually am not) because of multiole scabs on my face and legs. Is this normal? How do I get to a point where i dont pick at it? At least i finally admit it.