It's better to make up the first frost in a year. It means that the temperature drops and the air is dry in winter, which is the most likely to cause people's physical discomfort. In order to welcome the arrival of winter, according to the custom, people will eat some foods that promote fluid production, moisten dryness, invigorate qi and preserve health before and after the first frost. The first frost is also making more supplements to prepare for the severe winter weather. There is a folk saying that "it is better to make up the first frost than to make up the winter and autumn" and "the first frost will make up the tiger in the coming year".

As the first frost entered the late autumn, the weather gradually turned cold, and the phenomenon of autumn dryness was very obvious. Because dryness is easy to damage body fluids, dry mouth, dry lips, dry nose, dry throat, dry tongue, dry stool, dry skin and even chapped skin will appear. Hu Sihui, a great doctor in the Yuan Dynasty, wrote in Eating Rice: "Autumn is dry, eating hemp is easy to moisten it." Therefore, we should eat more moist food in the first frost season, such as sesame, honey, Chinese cabbage, sweet potato, radish, apple, pear, grapefruit, sugarcane, olive and so on. , to produce fluid, nourish yin and moisten the lungs.

In daily life, we should go to bed early and get up early, because getting up early has the function of nourishing yin, which can make the body full of body fluid and make people energetic all day. In addition to nourishing the lungs, it is also essential to nourish the spleen and stomach, because the first frost season is the high incidence of ulcers. At this time, the main reasons for the sharp increase in the incidence of ulcers are the stimulation of cold air, excessive gastric acid secretion and unreasonable diet. Cold air will stimulate the human body to increase gastric acid secretion, which in turn will stimulate the gastric mucosa and cause ulcers.