Firstly - welcome to the website :)
I do agree with the above, and I think it's about finding something that can work for you to release the emotions you are feeling in a safe way. Self harm (and particularly burning) is often used to release emotions, and the way to reduce the amount of times you hurt yourself - and consequently, the urges - is to find another way to get rid of the emotions.
The suggestions by makedamnsure are good, but there's plenty of other things. For anger I find physical things the best - exercise, walks, scribbling, etc. There's a heap of good suggestions
here. Maybe making your own list of things that help you, have at least ten, and do some until the urges leave. Then if they reappear an hour later... try some more. Eventually the cycle will be broken.
(Oh, dealing with the cause of anger is good too, like discussing it in therapy or ranting about it in the ranting & venting forum, trying to overcome it, etc if possible. Removing it in the first place is also a handy idea, but not as easy as learning different ways of dealing with anger.)
Have faith - you can get through this xxxx