My daughter is fourteen years old. Usually people don't feel very hot, but she is sweating. She always said it was hot. When she came back from school, her back was covered with sweat. A knowledgeable doctor will help her answer. Thank you.

There are two most common types of sweating caused by pathological reasons: one is night sweats, which appear unconsciously when sleeping at night. The other is spontaneous sweating, which occurs during the day and does not sweat spontaneously due to labor, thick clothes or heat, or after a little exercise. The main cause of spontaneous sweating is physical weakness or after a serious illness. Traditional Chinese medicine believes that it is caused by "insufficient lung qi and unstable Wei Yang". Treatment should be based on the principle of "tonifying lung and benefiting qi, consolidating exterior and nourishing yin". You can take Buzhong Yiqi Pill and Shengmai Drink to nourish the earth and produce gold, replenish qi and astringe sweat, or chew American ginseng and ginseng, or you can add and subtract Shengmai Powder and Yupingfeng Pill. Sweat gland secretion is closely related to exercise intensity: the general rule is that the greater the exercise intensity, the more perspiration. Because with the increase of exercise intensity, muscle activity is more intense and more calories are produced. In order to maintain a normal body temperature, the human body must increase the amount of perspiration to emit excess heat. Therefore, the greater the intensity of exercise, the more perspiration is bound to occur. The amount of sweat is first related to individual differences: as we all know, sweat comes from the secretion of sweat glands, and the number of sweat glands is extremely large. Millions of sweat glands can be roughly divided into two categories: one is eccrine glands, which are widely distributed under the skin of the whole body, with an average of about 300 per square centimeter and about 2.3 million all over the body. When exercise or the temperature of the external environment rises, the human body mainly relies on this sweat gland to sweat, which physiologists call warm sweat. The other is apocrine gland, which is distributed under the skin of armpit, nipple and vulva. When people are frightened, excited or humiliated, it is mainly this gland that sweats, which physiologists call nervous sweating. Physiological studies have found that there are not only gender differences but also individual differences in the number of small glands and large glands. Therefore, under the same conditions, some people sweat more and some people sweat less. In addition, individual differences are also reflected in the number of body fluids. Some people have more body fluids and sweat more when exercising; Some people have less body fluids and sweat less when exercising. The amount of body fluids often depends on the fat content in the body, because there is less water in adipose tissue, so fat people have less body fluids than thin people. Although fat people sweat a lot during exercise, their tolerance to water loss is relatively poor. In other words, if the exercise time is not long, fat people will get tired prematurely because of the disorder of water and salt metabolism. Whether to drink water before exercise also affects body fluids. If you drink plenty of water before exercise, you will also increase sweating due to the increase of body fluids. So the amount of sweating varies from person to person, so don't worry. It is normal to sweat a lot during exercise. Sweating is a way for the human body to keep its body temperature normal because the ambient temperature rises. In order not to cause body temperature problems, sweat glands at the bottom of human skin secrete body fluids and evaporate them to take away the excessive temperature in the body. The high temperature in summer affects the body's internal and external body temperature, and the organs are prone to edema, which is life-threatening. Therefore, in summer, the human body will secrete a lot of body fluids to keep the body temperature normal. And some people sweat more and sweat less for many reasons. Like obesity. Body fat is like a sponge used to keep warm, which has a strong insulation effect. The human body also produces a lot of heat because of exercise, and the fat in the body just hinders the emission of these heat. In order to dissipate heat as soon as possible, the body uses a lot of sweating to dissipate heat. Thin people don't have to do this. But there is another reason, and that is calcium deficiency. Many people know that sweat contains more sodium chloride and should be supplemented with salt when sweating, but they ignore the need to supplement calcium after sweating. According to research, every 1000 ml of sweat contains 1 mg equivalent of calcium. In normal times, only 15 mg of calcium is lost from sweat every day, which is not very important. However, people who work in high temperature environment in summer lose more than 100 mg of calcium from sweat every hour, accounting for almost 30% of the total calcium output, which easily leads to hypocalcemia. In order to prevent hypocalcemia after sweating, high-temperature workers should take enough calcium in their lives. Foods rich in calcium include milk, dairy products, green leafy vegetables, fish, seafood and other foods. Vitamin d can promote the absorption of calcium. Foods rich in vitamin D include cod liver oil, animal liver and egg yolk. Increasing sunlight exposure can also increase the content of vitamin D in the body. In short, in summer, you can avoid weakness and sweating by exercising more and strengthening your physique.