I'm really sorry. I understand, recently I bruised my face up pretty bad. I haven't cut in years, but started self hitting when I was 19 and at nearly 23 it's still something I struggle through. Thinking up lame excuses like "I got in a fist fight. Yeah I may have these bruises, but you should see the other girl's face." to cover my shame has really gotten old.
I do it because I'm so hurt, angry, disappointed, ETC. My feelings overwhelm me. I've been told that I'm being manipulative, but I'm not. I simply can't express my frustration any other way without hurting someone or breaking something.