Multiple picking/eating disorders

I have a severe problem with different forms of picking/eating. I eat scabs (from anywhere on my body), skin (particularly from my fingertips and peeling callouses on my feet, which I often pick to the flesh) and I pull hair and eat the roots. I also like to lick the blood from scabs I pick. I guess what I'm wondering is, is there any thing I can do (that does not involve medication, I detest pharmaceuticals) to help with these problems. I know how to control them to a degree but when I get stressed out or bored I just revert to my habits without even thinking about it. It only really registers later on when my feet hurt to walk on, it hurts badly to wash my hair, or I notice thin spots in my hair. I know it isn't good to do and that it is disgusting but I haven't been able to find a way to stop it. I'm lucky that I was able to stop my nail biting but I think curing that forced me to channel the energy I would have put into that into my other habits. Please help. I'm sick of this.