I'm incredibly lucky my self harm scars on my arm are almost invisible, but they were very much there.
Main thing was weight gain. Ever since I got treated by mental health professionals I went from 130lb to 190lb. Of course correlation does not always equal causation, but I ate my pain away to cope with forced therapy, it was my only coping mechanism I could depend on. I've been losing the weight though, 160lb now! Hopefully in a year or two I should be normal for my height.
Also, just oily skin. I used to shower only once a month. I used to only brush my hair on special occasions.
Yellow teeth, barely brushed. Somehow never got a cavity.
Basically, to sum it up, I was an obese girl with messy hair and overall looked very self-neglected.
Now that I'm in my 20s, I'm doing better, I'm less of an outer mess, but I'm repairing my near decade of messups, and eventually, I'll look and maybe feel better, I don't know.