One of the causes of heart disease is hypertension. By getting irritable or angry repeatedly one raises their blood pressure unnecessarily. In patients who already suffer from high blood pressure this could lead to angina or strokes.
Anger is a basic human instinct and controlling anger is by no way easy but it is possible. There are lots of situations in our daily hectic lifestyles, when we get irritable. By losing your temper you not only damage your health but may say things that you may later regret, and sometimes may lead to irremediable situations.
One of the tried and tested methods to avoid losing your temper is to practise 'not losing it'. The moment you see yourself getting into a situation which will make you lose your temper, try and keep quiet. It will take a lot of effort and restraint but keeping quiet will let the moment pass and common sense will then prevail. Even if it involves counting from 1 to 10 or whatever that works for you, the effort will surely pay off not only at the time but also in the long term for your body.
As said by the famous Buddhist Zen master Thich Nhat Hahn, if we don't feel angry the 'seed' of anger has not manifested although it is still present in our system. It is not that we need to repress anger, we just need to recognise it and allow it to be. We can then later, touch it with our mindfulness and transform it. If we touch the seeds of compassion, forgiveness and joy in us and have them manifested several times a day, those seeds will become more important in our consiousness whereas if we touch seeds of fear, anger or pain, we are helping those seeds to grow stronger all the time.
"Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned".
The greatest remedy for anger is delay.