In spring, the temperature of nature is rising, but the indoor temperature can't keep up with the outdoor because of the thermal inertia of the house, resulting in the temperature difference between indoor and outdoor. This temperature difference reaches its maximum in the sunny afternoon of a day, often as high as 3-5℃ or even more. Especially when walking into a cool room from the warm sunshine, the elderly and patients must put on clothes and spring clothes to avoid catching cold and getting sick. Because the temperature rises (falls) fastest in spring (autumn) in China at the same latitude, the unique health-keeping proverb "Cover the spring and freeze the autumn" in China was born.

Winter goes and spring comes, which is a transitional stage from cold to hot. Although the weather is getting warmer, the climate often changes, sometimes warm and sometimes cold. Often after the sun comes out, it will be warm and sunny, and it will be cold when it is windy and rainy. Because people are used to wearing more clothes in winter, if they take off too much in spring, they will not adapt to climate change and get sick easily. Therefore, in the early spring, you should deliberately cover a little and slowly reduce your clothes.

Second, the origin of autumn freezing:

When the temperature drops in autumn, the indoor temperature lags behind the outdoor nature due to the thermal inertia of the house, resulting in an opposite temperature difference. Walking into the room from the outside, the temperature rises, so it is natural to take off your clothes and freeze in autumn to prevent sweating from hurting your body.

Going to Qiu Lai in summer is a transitional stage from hot to cold. Although the weather is getting cold, there is a process of transformation. Some people put on a lot of clothes quickly in autumn, and even put on cotton-padded clothes prematurely. This is not good, because putting on cotton-padded clothes too early will make the body unable to exercise in cold air, reduce the cold-proof ability, and is not conducive to the adjustment of human functions.

In this way, in the cold season of March 9, once the nose and trachea are attacked by cold air, the blood vessels inside can't resist and contract, reducing blood flow and weakening antibacterial ability. Bacteria hidden in the nose or trachea take the opportunity to move, causing cough, sneezing, runny nose, fever and cold. Therefore, it should be frozen again in autumn, and clothes should be added slowly.

Extended data

In the "extraordinary" period when spring covers and autumn freezes, people need to pay attention to food, clothing, housing and transportation, and should master the correct way of keeping in good health.

First, we should pay attention to strengthening physical exercise and improving physical fitness.

Secondly, it is suggested to use holidays to choose weather that is conducive to travel. It is beneficial to physical and mental health for a family to go for an outing in the suburbs and be surrounded by nature.

Third, keep a good optimistic attitude and avoid wasting energy and hurting yin.

Fourth, when the weather is cold, we should add clothes in time. When the weather is warm, we should properly "spring cover" to avoid exogenous cold.

Fifth, we should lose weight, eat less meat and eat more fresh vegetables.

References:

Baidu Encyclopedia-Spring Covers Autumn Freezing