In the face of hot summer days, many people like to hide in air-conditioned rooms, go out once in a while, and take a cold shower when they come back to cool down quickly. In fact, this practice is not desirable. In hot season or after work, the head is easy to sweat, and then the blood vessels dilate. If it is washed with cold water, it may cause abnormal intracranial vascular function. In summer, the temperature is close to the human body temperature, and sweat evaporation is the main way to dissipate heat, and heat removal is a better method.

Hot tea is the best drink in summer.

The temperature is high, many people think that drinking cold drinks can quench their thirst and refresh themselves, but Chinese medicine believes that hot tea is the best summer drink. Caffeine, theobromine, theophylline and aromatic substances dissolved in hot tea can excite the cranial nerves, help regulate the body temperature center, strengthen the heart for diuresis, increase the blood flow of the kidney, accelerate metabolism, and make the excess heat in the body excrete with urine. Drinking hot tea can promote blood flow to the body surface, open sweat pores, relax sweat glands, promote sweat discharge and emit heat. Some people have determined that drinking hot tea for 9 minutes can reduce the skin temperature 1℃ ~ 2℃, and the cooling can last for more than 15 minutes. People with chronic diseases are prone to heatstroke in hot summer. Tea polyphenols, vitamin C, ester polysaccharide and other components in tea have the functions of protecting the heart, lowering cholesterol and blood lipid, protecting hematopoietic function, increasing white blood cells and enhancing resistance, so drinking tea is very beneficial to strengthening the body and preventing heatstroke.

You should also be careful not to let your feet catch cold in summer.

In summer, many people like to put their feet directly under the faucet for a flush, which makes them feel cool, comfortable and convenient. Some people think that washing feet with cold water can also promote the blood circulation function of the feet and improve the body's ability to keep out the cold. Actually, this is a misunderstanding. As the saying goes, "Cold starts from the soles of your feet." Because people's feet are the distal parts of vascular branches, they are prone to peripheral blood circulation disorders and lack sebaceous glands on the soles of their feet, so they are very sensitive to cold. Someone has done experiments. If you put your feet in cold water at 4℃, the reflex will cause vasoconstriction of nasal mucosa, and symptoms such as runny nose and sneezing will appear after three minutes. Even in hot summer, be careful not to let your feet catch cold. Keeping feet warm has a good effect on preventing diseases such as colds, flu, rhinitis, asthma and angina pectoris. This is especially true for the elderly and children. Wash your feet with hot water before going to bed every night. The temperature of foot washing water should be higher than the body temperature, and the amount of water should not exceed the ankle. If you insist on washing your feet with warm water every day, it can also play a role in regulating qi and blood, stimulating appetite, relaxing muscles and promoting blood circulation, and has certain therapeutic and preventive effects on insomnia, joint pain, indigestion, low back pain and stomachache. The same is true of the folk proverb "It is better to take tonic than to soak your feet in hot water".

In addition, it is best to take a hot bath in summer. When people soak in warm water, the pores will open quickly and the heat in the body will be released. Through repeated soaking, the sweltering heat in the body can be completely eliminated and the symptoms can be cured. On the contrary, if people soak in cold water directly, the pores will close immediately. Although the skin will feel cool, the heat in the body can't be completely discharged, and it will still feel very hot after a while, which can't really cool down. This is why taking a hot bath in summer can relieve the heat better than taking a cold bath. Experts also suggest that strengthening heat resistance can improve the thermoregulation function and enhance heat dissipation, which can not only prevent heatstroke and other heatstroke symptoms effectively.

Sweating is a good way to cool down.

Sweating is a way for the human body to dissipate heat. So you can't be greedy. Heating with heat and sweating are good ways to cool down. There are about ten thousand sweat glands in the human body. The discharge of sweat has the function of regulating body temperature, and also discharges some metabolic wastes. Nowadays, the high development of air conditioning and its application are becoming more and more popular. For people who are in a stable temperature environment for a long time, sweat glands are almost idle, and they don't sweat often even in the sweating season in summer, which is harmful to their health. Poor sweat glands lose an important detoxification pipeline and an important defense line for immune disease prevention. Starting from conforming to the laws of the four seasons and life, you should sweat when you sweat. Ginger has three functions: sweating and relieving exterior syndrome, warming stomach and stopping vomiting, and detoxifying. People in air-conditioned environment should often drink ginger soup, which can effectively prevent air-conditioned diseases, and it is best to drink ginger soup in the morning.

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