Scab Picker

I am glad that I found this forum tonight. I have been picking scabs on my scalp for over 22 years now and sometimes I eat them. Only a few close people to me know that I do this as I am extremely ashamed of what I do. I never knew before today that there was a name for it-Dermatillomania. When I was young I had some emotional issues and was not completely diagnosed with depression until I turned 20. Currently I am in my mid-forties and have kept this secret a long time. Being new to this forum can anyone tell me the best way to get treatment? I am already taking depression medication but I am not even sure if this disease is linked to depression. Most of the readings I have looked at refer to OCD or BDD as a common factor.