Honestly, one that doesn't seem like it's super important but actually is: scarring. I used to SI. I stopped completely in June 2013. It is now November 2017 and my arm and legs still look like they were put through a meat shredder. I wouldn't say I'm ashamed of my mental illnesses, but it's really degrading to still, 4+ years later have strangers asking me what happened to my arm. I'm extraordinarily self-conscious of it. And like I said, it's been 4+ years and the scarring is still extremely visible. It apparently takes much longer than you'd ever guess to fade.