I hope I wrote it right, I'm sorry. Mine is that I gnaw at the insides of my cheek so much (I always joke about it, saying it's the only source of meat that I consume ahah), I scratch my body until I bleed and I pick at my skin, I used to put off cigarettes and joints on the skin of my shins and for years I've been picking the scab off, now I have so many scars that it became revolting to look at...
Do you have a self pacifying behaviour?