Edema occurs in the summer due to the following three reasons: 1, the summer temperature is higher, people are used to drink more water in the summer, when the intake of water is greater than the body’s discharge of water, it can cause edema; 2, the onset of volatile evil in Chinese medicine, volatile evil often due to the winter felt the dampness of the evil, the violation of the body did not discharge out, spring has inverted spring cold, and felt the cold evil, so the spring felt the cold evil, it is hidden in the body up. In summer, when the weather is hot, people like to go to cool places, and dampness accumulates in the body to produce edema, which is considered by Chinese medicine to be the onset of volatile evil; 3, related to personal constitution, such as yin deficiency constitution, the imbalance of yin and yang in the body, now yin deficiency can not restrain yang, yang to summer, upward and outward performance, acting on the upward and outward parts, yin can not contain yang, so yang is stagnant in the body surface feeling suffocated, not edema The body surface of Yang feels suffocated and swollen, not edema, but emphysema, and there is not necessarily a depression when pressed by hand, or the depression can be quickly restored to a horizontal position.