It is not a good thing to carry around a lot of anger. To help get rid of it, try exercising with anger. Run hard, hit a tennis ball repetitively and hard, hit a punching bag, swim as fast as you can as long as you can. It should help relieve the anger enough that you can think about what specifically is making you angry. When you reach the point when you can talk about it, there are people who can help you talk it out.