1. Classification of hypotension 1. Postural hypotension When the position changes, such as squatting up and standing, standing for a long time due to insufficient blood supply to the head will appear black in front of the eyes, dizziness and symptoms. Most of the elderly people with vascular sclerosis have two main reasons: first, most of them have atherosclerotic lesions, resulting in a decrease in the body’s ability to regulate blood pressure; second, some elderly hypertensive patients are caused by improper use of antihypertensive drugs. In addition, many white-collar workers are too busy due to work, usually very little physical exercise, and over time the activity of the blood vessels subsequently reduced, the reactivity of the blood vessels also gradually become poor, suddenly carry out such as squatting action, blood pressure can not easily back up, will produce a sense of dizziness. 2. Somatic hypotension Somatic hypotension is mainly weak and thin women, some friends do not have any symptoms, some may appear long-term vertigo, weakness, shortness of breath, mental discomfort, easy fatigue, etc.. In addition, some women in order to slim down, excessive diet or diet structure is not reasonable, the intake of fat content and protein is not enough, in the long run lead to insufficient supply of nutrients in the body, resulting in the symptoms of hypotension. 3. Transient hypotension is more common in the summer, the hot weather, excessive sweating, blood vessels expand and lead to a reduction in blood supply, there will be a temporary headache dizziness, chest tightness and shortness of breath. Second, the prevention and treatment of hypotension hypotension generally does not require drug treatment, the focus on prevention. Daily, we should strengthen exercise, enhance physical fitness, and maintain a balance of good deeds. 1. Etiological treatment Those who are weak should strengthen nutrition, those who suffer from tuberculosis and other wasting diseases should strengthen treatment, those who are caused by drugs can stop or adjust the dosage of drugs. 2. Strengthen exercise appropriately. Live a regular life and prevent overexertion, as extreme fatigue can lower blood pressure. Maintain a good mental state, appropriate exercise, improve physical quality, improve the regulation of nerves and blood vessels, accelerate blood circulation, reduce the onset of upright hypotension, the elderly exercise should be based on environmental conditions and their own physical conditions to choose sports, such as tai chi, walking, gymnastics, etc. 3. diet conditioning Each meal should not be too full, otherwise it will reduce the blood flow back to the heart. The elderly with low blood pressure can drink some light salt water early in the morning, or eat a slightly salty diet to increase water intake, more water into the blood can increase blood volume, which can raise blood pressure. Drink tea in moderation, because the caffeine in tea can excite the whistling center and cardiovascular system. 4, hypertensive patients take decompression drugs according to the guidance The elderly should pay special attention to the prevention of postural hypotension, hypertensive patients must take antihypertensive drugs under the guidance of a doctor, do not change the type and dose of antihypertensive drugs at will; usually pay attention to the speed when changing the position, such as getting up or squatting do not be too fast and too urgent. Finally, if symptoms are not relieved for a long time, go to the hospital in time to diagnose the type of hypotension and treat it.