The origin of the great summer heat in the twenty-four solar terms

The hot summer can be said to be the hottest period of the year. At this time, the sunshine is the most and the temperature is the highest, which is also the last solar term in summer. The hottest and most difficult time, the following is the origin of the 24 solar terms and the precautions for heatstroke prevention. Please refer to.

The origin of the great summer heat in the twenty-four solar terms

The summer heat is the twelfth solar term in the twenty-four solar terms of the lunar calendar. At this time, the sun reaches the longitude of the yellow meridian 120 degrees. "Tongwei Filial Piety Helps the Gods": "The fifteenth day of Xia Hou is not summer, but mid-June. The small ones and the big ones are extremely hot, and they are divided into sizes. It was small at first, and it became big after reading it. "

At this time, before and after the mid-autumn period, most parts of China are the hottest period in a year, and the growth rate of heat-loving crops is also the fastest. The working people in China divide the summer heat into three periods: "rotten grass is firefly;" Second, wait for the soil to moisten and cool off the heat; It clears up when it rains. "

There are more than 2000 species of fireflies in the world, which are divided into aquatic and terrestrial species. Terrestrial fireflies lay eggs on hay, and when it is hot, fireflies ovulate, so the ancients thought fireflies were made of rotten grass. The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.

Summer heat: The hottest weather of the year is coming.

Summer is one of the twenty-four solar terms of the lunar calendar, and the sun is located in the yellow meridian 120. Celebrate on July 22nd or 23rd every year. Summer solar terms are in the "three volts", which is the period with the most sunshine and the highest temperature in China. Most parts of the country are dry and lack of rain, and the temperature in many areas is above 35 degrees, so the so-called "three stoves" are also the most prosperous. From the middle and lower reaches of the Yangtze River to Jiangsu, Zhejiang, Jiangxi and other places north of South China, it is hot and rainy, and the rain drops like gold.

In the western part of South China, although the high temperature appears most frequently, the rain is the most abundant and the thunderstorm is the most common, which is the season with the most thunderstorms. At this time, it is the hottest period of the year, with the highest temperature and the fastest growth of crops, and droughts, floods and windstorms are the most frequent in most areas. It is very important to grab crops and seeds, prevent drought and drainage, and manage fields. There are folk customs such as drinking tea, drying ginger and burning incense.

Precautions for high temperature in summer

1 Prevention of heatstroke

When the relative humidity is higher than 85% and the temperature is 30-3l℃, or when the relative humidity is 50% and the temperature is 38℃, or when the humidity is low and the temperature is 40℃, the temperature regulator will have difficulty and heatstroke will occur. One reason of heatstroke is that sweat is not easy to evaporate because of high temperature and high humidity, and the other reason is that sweat seeps out too much because of high temperature and low humidity, so that human water can not be replenished.

The most important thing to prevent heatstroke is to improve the microclimate environment, heat insulation through trees and water curtains, and cooling through natural and mechanical ventilation environment. For high-temperature workers, it is necessary to provide reasonable nutrition, and drinks and medicines for heatstroke prevention and cooling are also necessary.

2 Prevention of dermatosis and food poisoning

The dog days are hot and humid, bacteria and viruses multiply rapidly, and the incidence of skin diseases is also increasing, such as eczema, prurigo and fungal infection. Therefore, we should pay more attention to the cleanliness of the skin, ventilate indoors and wash our hands after taking the bus.

Bacteria multiply very fast in this solar term and easily cause food poisoning. The main symptoms are fever, chills, abdominal pain, diarrhea, purulent bloody stool and acute diarrhea. See a doctor as soon as possible. In addition, pay attention to food hygiene, pay attention to killing flies, and don't eat unclean meals. It is best to eat the food on the same day, and the food should be boiled and heated overnight.

3 Reasonable exercise

For healthy people, you can do more exercise on the premise of drinking more water, eating reasonably and getting enough sleep. Sweating is also good for your health. The amount of exercise should be different according to your own physique. Generally speaking, a healthy person sweats a lot after doing some big exercises, which will make his body feel comfortable and carefree. The amount of exercise should be based on this. It is best to exercise in the morning or evening, and avoid exercising in the scorching sun. Choose sports with relatively small amount of exercise, such as broadcast gymnastics, Tai Ji Chuan, skipping, jogging, badminton, table tennis, etc. Avoid being too tired and sweating, consuming gas and hurting body fluid. It is worth noting that after stopping exercise, you can't use cold water to cool your body, and you can't drink too much cold drinks. It is best to drink hot tea or mung bean soup to prevent heatstroke. Don't stay in bed immediately after strenuous exercise and don't eat immediately.

Great summer health strategy

1 1 coix seed red bean porridge

50 grams of Coicis Semen and 25 grams of adzuki bean are washed, put into a pot, soaked in proper amount of water for 3-4 hours, cooked together until cooked, and eaten after cooling. This kind of porridge has the functions of clearing heat, diuresis and detoxification. Patients with frequent micturition, urgency and dysuria can often eat it.

2 Bitter gourd lean broth

200 grams of fresh bitter gourd, peeled and diced, lean meat 100 grams, diced. Add a proper amount of boiled soup to the casserole. Add some salt to taste after cooking. It can clear away heat and relieve summer heat, improve eyesight and detoxify, and is especially suitable for people with polydipsia, swollen gums and increased eye secretions caused by summer heat.

3 mung bean pumpkin soup

50 grams of mung beans, 500 grams of old pumpkins and a little salt. Wash mung beans with clear water, add a little salt (about 3 grams) when the water is still wet, stir well, marinate for a few minutes, and then rinse with clear water. Peel the pumpkin, wash the pulp with clear water and cut it into 2 cm square pieces for later use. Add 500 ml of water to the pot, boil the mung beans for 2 minutes, pour in a little cold water, then boil, put the pumpkin in the pot, cover the pot, and cook for about 30 minutes with slow fire until the mung beans bloom, and add a little salt to taste. Has the effects of clearing away heat, relieving summer-heat, detoxicating, diuresis, promoting fluid production and benefiting qi.

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