Is it normal i eat my scabs, white heads, and black heads?

I am a teenager. I don't know how long I have been doing this but I used to do methamphetamines and it might have done something to do with it. I think I started like two years ago. But I am constantly eating my scabs, white heads, black heads, and sometimes even boogers. And this is not a joke. And yes I am off drugs now and I continue to do this.