In autumn, the temperature begins to decrease, the rainfall decreases, the air humidity decreases relatively, and the climate tends to be dry. Autumn qi should be in the lungs, and the dry climate in autumn is easy to damage the lung yin, leading to dry mouth and throat, dry cough and less phlegm, dry skin, constipation and other symptoms, and even severe hemoptysis, so autumn health care should be prevented from dryness.

Autumn, in dry air, also means cool autumn. After people vent excessively in summer, all the tissues and systems of the body are in a state of relative water shortage. If people catch cold from the wind at this time, it will easily lead to a series of symptoms such as headache, stuffy nose, stomach pain and joint pain, and even make old diseases relapse or induce new diseases. Old people and people with weak constitution have poor adaptability and tolerance to this change, so they should pay more attention to cold protection.