What should I do if my body is particularly afraid of heat?

In hot weather, in order to protect themselves, the human body mainly radiates heat in two ways. 1, direct heat dissipation: When the surface temperature of human body is higher than the ambient temperature, the heat generated by human body can be dissipated to the external environment in the following three ways: one is to radiate heat directly to the outside in the form of heat rays, which is called radiation heat dissipation; The second is that the heat is directly transferred to the cold objects in contact with the human body, which is called conduction heat dissipation. The second is that the heat is taken away by the cold air around the body surface, which is called convective heat dissipation. Under the climatic conditions in most parts of China, except in hot summer, the temperature of the external environment is generally lower than the body surface temperature, so the heat lost through the above three ways accounts for about 85% of the total heat dissipation of the human body. How much heat the human body directly loses through the skin depends on the temperature difference between the skin surface and the external environment, and the temperature of the human body surface can be controlled by changing the amount of blood flowing through the skin. When the blood vessels in the skin are relaxed and the blood flow is large, the body surface temperature is high; Skin blood vessels contract and the blood flow is small, so the body surface temperature is low. Therefore, the human body can change the heat dissipation of the human body in a considerable range by changing the contraction state of skin blood vessels. (2) Evaporation and heat dissipation: Evaporation is a process in which a substance changes from a liquid state to a gas state. Evaporation requires heat. At room temperature, 1 g water evaporates from the skin surface and absorbs 2.43 kJ of heat from the body, so evaporation is a very effective way to dissipate heat. The total amount of evaporation depends on body surface area, skin temperature, air temperature and air flow. Air flow not only accelerates convective heat dissipation, but more importantly, it takes away the water vapor near the skin and promotes the evaporation of water, resulting in greater heat dissipation. This is the reason for sweating. Sweat evaporates at any time, showing recessive sweating; The evaporation rate is slow, and the water droplets gather into water droplets, which obviously perspires. Humidity has the opposite effect. The higher the humidity, the lower the evaporation. When the air temperature and the temperature of the surrounding objects are close to body temperature, both radiation and convection lose their functions, and then the heat dissipation depends entirely on evaporation. Sweating is a way of regulating body temperature. When we feel hot, or during exercise, sweating can help the body to lower the body temperature to a normal level through the evaporation of sweat. However, we also find that some people, especially those in love sweating, always have wet hands and feet even in winter. Sweating too much like this is a pathological state called hyperhidrosis. The incidence of hyperhidrosis is high. According to research, 1 person in every 500 people is susceptible to this disease. Some studies also believe that the disease may be related to genes, which means that the disease is hereditary. Sweating is controlled by the sympathetic nervous system. There are as many as 5 million sweat glands in the human body, two-thirds of which are distributed in the palm of your hand, so your palm is prone to sweat when you are nervous. Experts believe that the main cause of hyperhidrosis may be excessive secretion of sweat glands caused by excessive excitement of sympathetic nerves. Judging from sweating, healthy hyperhidrosis includes palpitations, hyperhidrosis, mood swings and insomnia, which may be the manifestations of hyperthyroidism; A series of symptoms such as chest tightness, subcostal pain, loss of appetite and cold sweat may be the manifestations of cardiovascular and cerebrovascular diseases; Diabetes can lead to autonomic neuropathy, and patients show abnormal sweating, such as no sweat, less sweat or more sweat. Therefore, when you encounter skin hyperhidrosis with unknown causes in clinic, don't forget to check urine sugar, blood sugar and blood sugar metabolic rate. Hyperhidrosis has two main manifestations: spontaneous sweating and night sweats. Spontaneous sweating refers to not sweating because of exercise, excessive clothing or high temperature when awake during the day. Spontaneous sweating is the manifestation of qi deficiency and yang deficiency. Generally speaking, the body is not healthy enough to protect the skin, which leads to the leakage of body fluid. People who sweat by themselves are usually listless, short of breath and afraid of the cold. Night sweats are sweating in the chest, back, thighs and other parts in the middle of the night or at dawn after falling asleep, with a large amount of sweating, and sweating stops after waking up. Night sweats are mostly caused by yin deficiency, often accompanied by symptoms such as upset, low fever, flushing on cheeks, fever in hands and feet, and dry mouth. In addition, different parts of sweating also represent different meanings. For example, sweating on the head and face is caused by heat in the liver and stomach and qi deficiency; Sweating on hands and feet is mostly caused by damp-heat of spleen and stomach, qi deficiency and kidney deficiency. Various treatment methods Foreign scientists have been studying hyperhidrosis for many years, and patients have tried various treatment methods, including western medicine, emollients and oral drugs. But so far, effective treatment methods are limited. Sweating itself is a way to regulate body temperature and dissipate heat. For example, work, exercise, emotional excitement and sweating after nervousness are all normal, so sweating is a normal performance. Chinese medicine believes that sweating also has its reasons, such as the Yellow Emperor's Internal Classic. There are individual differences between people. For example, fatter people sweat more and thinner people sweat less, which is normal. Sweating must be divided into physiological sweating and pathological sweating. Pathological sweating is the cause of hyperhidrosis, which is generally the manifestation of central nervous system dysfunction. Chinese medicine believes that sweating is caused by yin-yang imbalance. How does Chinese medicine think that everyone sweats? There are medical classification rules for sweating, including spontaneous sweating, night sweats, head sweats, half-body sweats, hand, foot and heart sweats, etc. The most common are spontaneous sweating and night sweats. The so-called spontaneous sweating is involuntary sweating for no reason, usually in an environment where it is not hot and does not exercise during the day. Night sweats are medically considered to be sweating when you fall asleep at night and stop sweating after waking up. Of course, there are many other sweating situations that are classified. Spontaneous sweating and night sweats are partly pathological in medicine and combined with some diseases. Sometimes it is related to the disorder of the central nervous system in the body. Spontaneous sweating is related to many diseases, such as fever, pneumonia, rheumatic fever and so on. In addition, there are some causes of endocrine disorders, such as menopausal syndrome, and some metabolic diseases, such as hyperthyroidism. There are also some common diseases such as diabetes, hypoglycemia or coronary heart disease, pain and hypoxia. There is also sweating caused by drugs, such as taking aspirin. So there are still many reasons for spontaneous sweating. People will sweat, sweating is a physiological function of human excretion and body temperature regulation. However, if the way of sweating or the amount, color and smell of sweat change, it can be used as a reminder of some diseases and should be paid attention to. The following is an explanation of some common sweating phenomena from the perspective of traditional Chinese medicine: spontaneous sweating is not called "spontaneous sweating" because of the sultry weather, taking sweating drugs and other stimulating factors. It is mostly caused by deficiency of lung qi, weakness of yang qi and leakage of body fluid, so it is often accompanied by symptoms of yang deficiency such as fatigue, fatigue, shortness of breath and chills. Sweating is common in children with rickets and hyperthyroidism. Sweating is a physiological function of human body to excrete and regulate body temperature. However, if the way of sweating or the amount, color and smell of sweat change, it can be used as a reminder of some diseases and should be paid attention to. The following is an explanation of some common sweating phenomena from the perspective of traditional Chinese medicine: spontaneous sweating is not called "spontaneous sweating" because of the sultry weather, taking sweating drugs and other stimulating factors. It is mostly caused by deficiency of lung qi, weakness of yang qi and leakage of body fluid, so it is often accompanied by symptoms of yang deficiency such as fatigue, fatigue, shortness of breath and chills. It is more common in children with rickets and hyperthyroidism. Another possibility is lack of calcium and vitamins. Summer needs comprehensive and balanced nutrition most. In a high temperature environment, the human body will consume a lot of nutrients. Besides three meals a day, vitamin C, vitamin B 1, vitamin B2, vitamin A and vitamin D should be supplemented from vegetables, fruits and diet. People with more calcium loss should also supplement high-quality calcium preparations. In addition, in order to prevent heatstroke, the following heatstroke prevention and cooling products are recommended. 500 grams of cold water watermelon juice, seeded, juiced in a juicer, added with 500 ml of cold boiled water, proper amount of sugar and a little salt, and put it in the refrigerator for drinking after cooling slightly, which has the functions of clearing away heat, relieving summer heat, promoting fluid production and quenching thirst. Watermelon Cui Yi Drink 200 grams of fresh skin of watermelon (called watermelon Cui Yi), wash and cut into pieces, add appropriate amount of water, and decoct for 15 minutes. After cooling, slag is removed to get juice, and appropriate amount of white sugar is added instead of tea, which has the functions of clearing heat, relieving summer heat and diuresis. Sour plum soup contains 50g of ebony and 5g of osmanthus. Soak ebony for half an hour, add 1000 ~ 1500ml of water, decoct for 15min, add osmanthus fragrans, boil for 1 ~ 3min, filter to get juice, and add a little sugar and salt until the tea is cool, which can clear away heat and relieve summer heat and stimulate appetite. Mung bean soup: mung bean 100g, rice 20g (adding a little rice can remove the bitterness of mung bean), and water 3000ml. Put mung beans, rice and water into a pressure cooker and cook for 20 minutes. Drink it when it is cold, which has the effect of relieving summer heat and quenching thirst. Cooking mung bean porridge with100g mung bean and 200g rice has the effects of invigorating spleen, relieving summer heat and quenching thirst. Double scented tea honeysuckle 10g, green tea 3 ~ 5g, soaked in boiling water instead of tea, has the functions of clearing away heat and toxic materials, relieving summer heat and quenching thirst, and can prevent and treat dysentery and malnutrition. Mint herbal tea fresh mint leaves 10g, green tea 3 ~ 5g, soaked in boiling water, added with appropriate amount of white sugar, cooled and drunk, has the functions of cooling and quenching thirst, expelling wind and relieving sore throat, and is suitable for people suffering from exogenous wind-heat in summer. Lotus leaf herbal tea 20 grams of fresh lotus leaf, soaked in boiling water, added with a little rock sugar, cooled and drunk, has the effect of relieving summer heat, quenching thirst, reducing fat and losing weight, and is suitable for obese people to drink in summer. In addition, eating more fruits and vegetables such as watermelon, cucumber, tomato, peach and apricot in daily diet can also prevent heatstroke.