How do you convince your therapist that this REALLY is a problem??

Hi everyone. I am a 64 year old gay women who has been picking for as long as I can remember. Finding this site has given me the courage to finally admit that this is a real problem. Just when I think I have it under control I realize that I probably won't ever be able to stop. I have been chronicly ill since my early 20's. Arthritis, diabetes, high BP, under active thyroid, depression, acute anxiety disorder, now I guess I'll have to add OCD. I've always had poor self image and poor identity, and body image. I've been in therapy for at least twenty years with different therapists but never talked to them about the picking until now. I've started the drug Humera for my ulcerative colitis and am worried about infections. Have any of you had to deal with this??