Aggravation of anger outbursts is a marker for presistent pre-occupation with negative thoughts and decreased threshold for frustration.
The causes would include your current ongoing stressors and also your perception of coping with them.
These coping mechanisms vary from person to person and are unique for every individual.
They define our way of life and also state of existence.
The degree of lacunae you feel and the repetitive negative emotions makes one feel irritable and later ruminate about present options and ways to stop further episodes.
Realisation of such anger outburst in itself being wrong marks a good insight and will to seek help/remedy for it.
Next Steps
Consult a psychiatrist and start with medications and behavioral therapy sessions to learn about mature coping techniques that would aid in anger management.
Health Tips
Avoid very impulsive or harsh response to any one as such. In case you feel rage better is to seek a solitary and soothing place and try to deviate the ongoing thought process to something positive.