So I didn't know to put this for discussion or bug, thought this was the best place for it.
So I had a blunt trauma, a wound that I'm 90% sure doesn't heal over time, and went to a swamp to leech myself dry to get rid of it. Was unsuccessful and the trauma became infected. Out of curiosity, I let the infection run its course (the wound was only 2 damage) and after a couple of hours the infected sore healed the wound completely.
Just wanted to post this here because this seems like an unintentional side effect of the infected sore. Naturally unhealable wounds can be healed via infection with enough luck.
(If I am square brain and blunt trauma does heal over time, I'll just delete this embarrassment)