Anger is not necessarily a bad thing; it can convey that a situation is upsetting to you and protect you when you feel under siege. But anger becomes toxic when it is used as a substitute for other, more balanced, emotions.
Anger is about control, but if you can’t control your anger then you are out of control. People who suffer from constant bursts of anger often suffer from self-image deficits. And while they may manage to control these in a professional environment, their personal relationships usually suffer the brunt of their anger.
Angry people often have a hard time compromising, and view different opinions as a personal challenge to their authority. Anger in this case would be used to regain control, fend off feelings of vulnerability and invalidation and to self-soothe. Unchecked, anger can be harmful to both yourself and others.
What's that thing you have been procrastinating over?