a long time ago I actually picked such a deep hole in my cheek I have a significant scar from it. I finally got scared and went to a doctor and they looked at me like I was a bug, told me to pack the hole with some iodine packing until it got smaller and could close up on its own. I think she should have referred me to a plastic surgeon for the damage, and to a psychiatrist - I admitted I had an extreme compulsion to use tweezers/scissors and felt calmer afterwards. Ignorance I guess. Luckily it is not too noticeable, it looks like a dimple when I smile. It helps that I have very fair skin with a lot of redness in my cheeks, lots of other things to look at. I also have found that I like to pick my face and anything else that is the slightest bit of a bump, then throw up any food I have eaten. So my pattern when I am highly stressed and not doing well is eat a bunch of sugary food, pick, then throw up, then feel immensely calmer and able to sleep. Overall I have gotten beyond this but it does pop up now and again.