Yea, when you're depressed you don't take care of yourself. I saw the dentist for the first time in years recently and he told me I have the teeth of a 70 year old, times when I was really depressed I just didn't brush them, also because no one really taught me to take brushing them seriously when I was a kid.
I also have not cut myself, but I have a problem with picking at any pimples or imperfections till they turn into open wounds. I have carpal tunnel from desperately typing my life story and complains doubts and fears to strangers met online, not on this forum but over the last decade, looking for love and approval.
I am pretty much a master at emotional and psychological abuse of myself.
When you have so much pain that its all you can do to just hold on and make it through the day, things like brushing your teeth seem like an incredible burden.