Hey random tumblr citizen!
Since I don’t know who you are I’m going to have to take a very generalised approach to answering you.
Self-harm won’t achieve what you think it will. It’s just causing more harm to yourself in the long run. As for the issues concerning eating disorders, you’ll need to do some soul searching and find out deep down what is making you upset.
And there will always be people to help you! Even if it is a random post on Tumblr. So don’t harm your lovely self :) Stay positive x