If the patient often gets dizzy after standing up from squatting, the following points should be considered: First, the presence of postural hypotension should be taken into account. For postural hypotension usually increases with age, the elasticity of the arteries becomes brittle, and the patient will have an impaired blood pressure regulation mechanism, which will therefore lead to the above symptoms. Secondly, if the patient appears to be hypovolemic due to various factors, he will also have the above symptoms, for example, the patient will have this clinical manifestation after heat stroke in summer, or too many times of nausea, vomiting and diarrhea in acute gastroenteritis, without timely replenishment of body fluids. Third, if the patient takes certain drugs for a long time will have the above-mentioned adverse reactions and side effects, such as antidepressants or diuretics, vasodilators, will have the above-mentioned adverse reactions and side effects occur. Fourth, if the patient is in long-term heart failure or the internal environment homeostasis regulation function is weakened, such as anemia, etc., there will also be the above clinical reactions.