Anger and what to do about it? Listener question

I have strugrled with explosive temper resulting in lashing out.My emotinns are triggerd by feelings of injustice done towards me. I suppose by expressing anger one feels justified standing upto the injustice. If you can help with some tools as to how can the self feel ok and not express anger even in the face of injustice and how to navigate it in a better way. I feel terrible after i have lashed out and the feeling of anger is gone,also nothing actually is achieved with display of anger but in the moment its so difficult to remeber this and not lash out. Thanks