Anger is normal human emotion. It is healthy when controlled. Human beings rarely act physically expressing the anger. We have language hence we use verbal abusing and then only physical rage is followed if anger is not controlled. It can lead problems with family members and work place.
Anger is an emotion accompanied by physiological and biological changes. Your heart rate and blood pressure go up when you are angry. As well as your energy hormones, adrenaline and noradrenaline will increase.
A person could be angry at a specific person or event or anger may be caused by worrying about the personal problems. Memories or enraging events can cause angry feelings. Naturally anger is expressed aggressively. So there are fights and hence we defend us if we are attacked. We can not physically attack every person or object that irritates us or annoys us. Norms of social behavior should be followed. There are three main approaches to anger expressing, suppressing and calming. When you express your feelings in controlled manner it assertive manner and it is healthiest way. It is difficult to do this. You need to know your needs, how to get them met, without hurting others. It means being respectful to yourself and others.
When anger is suppressed, it is not allowed outward expression and it can turn inward on you. It may cause hypertension, high blood pressure or depression. If anger is not expressed it can create other problems. It creates either passive or aggressive behavior which fails to build successful relations with others. Finally if you can calm down inside your responses internally heart rate, blood pressure and outward behavior will be controlled. If these techniques are not successful then someone or something is going to get hurt. Anger can be controlled by simple techniques. Relaxation tools such as deep breathing can help calm down angry feelings. Breathing deeply and repeating soothing words like "take it easy" will enables you to reduce angry feeling. Practice this technique daily. Slow yoga and meditation is another way to relax.
The other way is to change the way you think. Angry people sometimes curse, swear or speak in highly colorful terms. When we are angry our thinking is exaggerated and extra dramatic. If we replace it with more rational thoughts it will help us. You have to remind yourself that getting angry is not going to solve anything. That makes you feel worse. We try to find out solution of our problems but sometimes that is not possible. Hence we get angry. Instead of that we have to learn to face the problem. When we are angry we come to conclusions which are often wrong. If we slow down and think carefully about what we want to say before answering it will solve the problems.