OCD Picking

I have been picking my cuticles basically my whole life, I believe I started at around 5 or 6, now i'm 26 and i'm still doing it. I not only pick my cuitcles I pick zits, dry skin that's anywhere on my body, my scalp, and most recently there have been zits on my breasts that I cannot stand and could spend most of my days picking at them until they bleed. This disorder drives me crazy and it's something that most of my family and friends don't understand, I don't understand it myself all I know is that it's something I have to do on a daily basis. People think that if they tell me i'll get an infections from doing this that i'll stop but truthfully that's the farthest thing from my mind; I do the most damage to myself when i'm stressed but I do find myself picking when i'm bored or to pass the time. My four year old son is constantly asking me why I have all these booboos and i'm at a loss to tell him why in a way he'll understand. I hate doing this to myself but I don't know how to stop and it's frustrating. I've tried acrylic nails and they work until they break off and then it's back to square one, i'm at the end of my rope and I really don't know what to do and that's why i'm here; to hopefully get support and possibly I can kick this habit but until then picking will always be a part of my life and day by day it's getting worse.