[Chazzz]

Source out why you feel the need to abuse your body like you do.
We could all sit and spit out what these things are doing to your body but I'm sure you're very aware that you're putting your health on the line.

The only way you're going to be able to get away from these things is to sort out the source of your problems. Perhaps it's weighing yourself down too much with the sports, a lot of pressure can lead to some people taking such actions. I don't know. I know nothing about you, so I couldn't comment.

If there's nothing you can think of, or you don't feel it's something you know how to deal with in a more constructive manner. Perhaps consider visiting your school therapist or a private office to try and help you through. And of course you have the community here to help you find answers.