"Three volts" is a general term for initial, intermediate and final volts, which appears every year from mid-July to mid-August in the solar calendar. Dog days, one volt is ten days, which is calculated according to the number of days. Therefore, the dog days are divided into three days, that is, the Geng Day on the third day after the summer solstice is the beginning day of the first volt.

For example, the summer solstice in 2006 is June 2 1 day in the western calendar year. The dry day of this day is Xin Day, and 28 days later, it is the third Geng Day. Therefore, July 20, 2006 is the beginning of the first volt.

Ten days later, it was another Geng day, that is, July 30, and it entered the second volt. Ten days later, it was another Geng Day, and it was the first Geng Day after beginning of autumn, that is, August 9, and it entered the third volt.

It is hot and hot in summer, people like cold drinks and drink more water, which causes moisture to invade the human body, while external moisture enters the body, which makes the water wet and strengthen the spleen, causing the spleen and stomach to rise and fall, causing digestive dysfunction, water accumulation and loss of appetite.

Summer dampness is very harmful to the spleen, and bitter food has the function of purging dryness, so it is not appropriate to eat more, so it is appropriate to eat more sweet and cold or sweet and cold in daily diet.

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