Hypertension is the largest hidden danger that endangers human health and causes various cardiovascular and cerebrovascular diseases. With the improving of people's living standard in modern times, its morbidity rate is rapidly rising as well.

Hypertension is a kind of common ailment, with high incidence, high rate of disability and high death rate. Many people, who would not like to go to hospital when the blood pressure is high, will gradually be used to the hypertension state without symptoms such as dizziness and headache, neither work or life would be influenced. However, it's very dangerous. Once there is emotional fluctuation or tire, it could cause a heart attack, cerebral hemorrhage and cerebral thrombosis. That'll be too late. So when you've got hypertension, have it cured as soon as possible no matter there is symptom or not, so as to avoid the occurence of hypertension emergencies.

Hypertension emergency means that in the course of hypertension, blood pressure rises sharply or remarkably caused by stimulation of some reasons, which will directly result in serious dysfunction even exhaustion of body's important organs such as the heart, brain and kidney, the our life is in danger. Essential hypertension and secondary hypertension can happen at any time.

Since the blood pressure is always kept on a relatively high level, caused by the combined action of added heart loading and other humoral factors, compensatory left ventricular hypertrophy will occur in early times, and heart will keep on extending with the disease development, which maybe lead to the heart failure and severe arrhythmia at last.

The blood pressure's rising in a long term could promote the form of atherosclerosis, especially the development of coronary sclerosis.

The blood pressure's rising in a long term will lead to arteriolar sclerosis, which makes arteriola breaks or fits easily, so as to result in the form of cerebral thrombosis.

Since kidney afferent and efferent glomerular arteriole's fit, cirrhosis and degrading will cause kidney ischemia & anoxia and renal parenchyma fibrosis, the last stage of hypertension is usually accompanied with process renal hypofunction.

The blood pressure's rising in a long term will make vitreous degeneration happen to the arteria retina.

Cerebral apoplexy and coronary disease are the most severe complicating diseases of hypertension.