There are about 3 million sweat glands distributed in the human body, and sweat glands have the function of secreting sweat. The discharge of sweat can regulate the temperature of the human body and also discharge some of the metabolic waste. When we feel hot or in the process of doing exercise, sweating can help the body lower its body temperature to a normal level through evaporation of sweat. However, abnormalities such as too much or too little sweat, or a strong odor should be alarmed. But whatever the cause of the abnormality, Chinese medicine classifies it as “sweating”. When the outside temperature rises to 30°C, the sweat glands, a “natural air conditioner”, start to secrete sweat, the amount of sweating determines the constant body temperature, and even affects the safety and security of life, and sweating too much or too little harm is different. If you sweat too much, it can cause the body’s blood flow to decrease and slow down the circulation, making the body’s heat dissipation tend to decrease, which leads to an increase in body temperature. A large amount of sweating can also cause the body to lose salt, cells due to lack of sodium and cause heat cramps. There are four main hazards associated with excessive sweating: the first is the loss of nutrients. When you sweat a lot, the body must lose zinc, selenium, manganese, iron, copper and other trace elements gradually, resulting in stunted growth in children and reduced fitness in adults. The second is a decline in immunity. People who sweat a lot, usually easy to catch a cold, common sneezing, nasal congestion, runny nose or nasal diarrhea. The third is the weakened digestive function. Manifested in poor appetite, anorexia, wasting, etc. The fourth is the intellectual development is restricted. Children sweating for a long time, the body slowly lost the necessary elements, the nervous system development is affected, inattention, intellectual development is impaired. There is a category of people who do not sweat even on hot days, a symptom called “no sweat”. This kind of people may be congenitally less sweat glands, but also may be due to a momentary feeling of wind and cold, the cold evil bundle table led to the hair tube couples closed, must immediately find a doctor to adjust treatment. But if the sweat does not come out for a long time, the accumulated heat in the body will not be distributed, and heatstroke is very likely to occur. Especially for the elderly, women and children, heat stroke often causes high fever and convulsions. People with high blood pressure, coronary heart disease and diabetes are also prone to strokes and myocardial infarction. In addition, the skin can not sweat, the body’s metabolic waste had to be discharged from other ways, if all through the urine discharge, is bound to increase the burden on the kidneys, for kidney disease patients may be more “worse”. The acidic environment of the skin will also change for people who do not sweat or sweat very little. The normal sweat contains lactic acid that kills germs on the surface of the skin, and the sebaceous glands also secrete fatty acids that are also specific to the sterilizing effect during sweating. If you suffer from “no sweat”, the skin’s resistance will be reduced, leading to the growth and reproduction of skin surface germs, which can cause toxemia or sepsis in serious cases.