Obsessive compulsive disorder
Get ready from some intense alphabet soup.
Turn out I have a form of OCD called body focused repetitive disorder (BFRD), more specifically a kind called excoriation disorder.
Which means I pick and scratch my skin with intensity even when I don't want to. It's gross, that's all you need to know.
It's something I do since forever but the worst label I've ever given it was "bad habit". But curiously, discovering a name for it in the form of excoriation disorder legitimatizes it in a way that give me hope of beating it.
I've long thought about the utility of an enemy. This is not the enemy I'm looking for but it's the enemy I get.