Anger can be useful; it alerts you when something isn't in your best interest, or when a situation is unfair or injust. However, anger can lead to aggressive reactions, which are often impulsive and unproductive. Separate your anger and aggression, then learn to calm your aggression to resolve problems.
Picture: Clemens v. Vogelsang/Flickr
When you feel your blood boil, it's important to separate it from the thought of aggressive expression. Calm your aggression. If you harness your aggression well, anger could be the fuel that leads to greater courage, clearer thinking and better connections with others. You may feel like aggressive reactions can help reduce your anger, but venting will probably only make you angrier.
Remember, you have a choice. You don't need to act out when you're feeling angry. Use it effectively by identifying your triggers and turning it into motivation.
Differentiating Anger from Aggression [Psychology Today]