What are the causes of hypertension?

Long-term hypertension can cause a variety of complications, such as coronary heart disease, myocardial infarction, chronic renal insufficiency, etc. The cause of complications is that when blood pressure rises, the heart load will increase, so myocardial oxygen consumption will increase, easy to induce myocardial infarction, angina pectoris, etc. In addition, hypertension can lead to lumen stenosis and damage renal function.