There is a saying: "If you want your child to be safe, you will always be hungry and cold." Children should not eat too much and dress too hot, even adults; However, don't spoil children too much, because if children are as delicate and fragile as flowers in a warm room, it will do harm to them. Wei Zhi? As mentioned in Wang Fu's biography, Wang Fu was "young and often bitter, and his bedding was too wet". Why? Because excessive warmth will block people's skin, hinder communication with the outside world, and the gas in the body is not accessible enough.

In order to prevent diseases, it is necessary to have foresight when changing clothes, "clothes should be put in front" and "clothes should be put on when cold, and clothes should be taken off when hot". You can't wait until you break out in a cold sweat, then it's too late.

People have summed up the experience of "covering spring and freezing autumn" in long-term practice, because the change of seasons has a gradual process, and the human body must have a gradual adaptation process. Don? Sun Siqi's "Qian Jin Fang" puts forward that "you can't wear thin clothes in spring, which makes you typhoid and cholera, and you can't eat it and have a headache." In the Yuan Dynasty, Qiu Chuji's "On the News of Health" also said: "Spring and ... the weather are not friendly, so we can't go to cotton-padded clothes. Old people are weak in popularity, thin and timid, and cold is easy to hurt. Speaking of warm clothes, they are easy to get. One by one, the weight is gradually reduced and it can't be washed away. " In early autumn, although it is cool, it is not too cold. You might as well wear a little thinner, so as not to wear too much at first, and then it will be unsustainable and lack the necessary ability to keep out the cold. Therefore, "winter should not be extremely warm, summer should not be poor and cool", "Xia Yue should not be completely thin, and cold months should not be extremely thick" to enhance the human body's ability to resist cold and heat.

The proverb "take care of heaven and earth, regardless of shit and fart" illustrates the simplest common sense: defecation cannot be banned. This has led to a custom: defecation can not be tolerated. Ancient medical books said: "It is inconvenient to endure urine, and cold knees become joint pain;" I can't stand the stool and get angry. " "It's inconvenient to endure urine, five showers, cold knees and joint pain; Endure defecation and become five hemorrhoids. "While avoiding forbearing defecation, we should also pay attention to avoiding another aspect, that is, don't forcibly defecate without defecation desire. This is called "not working hard".

"Qian Jin Fang" said: "If you don't urinate, your feet and knees will be cold; You don't have to exhale, strengthen your stool, and make people feel sore: it's appropriate to be good. " It means that urinating hard will make people's knees chills, defecating hard will make people's backs sore and their eyes hurt, and even anal rupture and hemorrhoid rupture will occur. We should let nature take its course and solve it when it is time. "The size of two things, don't try to be brave, don't lose your temper. Whether it is astringent or slippery, it is harmful to the body, which is very fast.