When I'm angry, why do I always feel the need to hurt myself?

Because you want to transfer the heavy feeling, the pain, the anger to something else. You want to transfer the emotional pain into physical pain because it the pain of it stays temporarily.

The person that made you feel this way wants you to be like this but you have to fight the urge to hurt yourself.

Hurting ourselves allows us to externalize our anger. It is often easier to deal with physical pain than emotional pain. Sometimes, we may also feel as though we deserve to hurt ourselves because of how we feel.

well it's because when you are angry you want to let it all out and the only person who is approachable it's only you although its not the right way to let it all out on your own self .

I think it is about feeling in control of something. If you are angry, you want to be able to do something about it, you want to control the anger, so you have the urge to hurt yourself.

well a lot of people feel the need to hurt themselves. I hurt myself in the past because i wanted to focus on another pain. Instead of hurting yourself you can try drawing a beautiful picture were you want to hurt yourself.

Perhaps you feel the need to punish yourself for whatever it is that made you angry. I know when I used to self harm it was because I was angry at myself for not being able to "make everything better"...

because you cant express your self properly and dont know how to so you hurt your self insted of expressing anger in a healthy way

It is smart to look for another outlet for your anger. Maybe draw, write, play an instrument, rip up papers, scream into a pillow. There are plenty of anger management tactics and hurting yourself is not productive.

Looking back on it now, I guess I used it as a way to take out my frustration I felt because I always put others so far in front of me. This isn't a bad thing to do though, just the way I dealt with it was wrong. I think I realized this while I was still self-harming, but I kept doing it anyways. Because it becomes an addiction. Just like any other addiction, it can be done mindlessly or to get a monetary sense of peace. But, everything I have said so far, can be drastically different to everyone. But one thing is always true, in the long run, it isn't worth it. For it may be a constant reminder, or trigger to yourself or others. Stay strong.