Anger is an emotion that I had trouble keeping boxed and still do to be honest. A lot of people seem to have trouble with this in recovery.
The best advice I have which helps me to settle it a bit is exercise in what ever form. For me it clears the mind cleanses the body and takes some spare aggression out of the mix.
Had my blood taken for some tests today and the nurse just said you could do with losing some weight. I looked at her with venom, Instant anger I felt like saying and your ugly but I'm off to the gym now! I am pleased to say I managed to keep this as an angry thought.✌️