After the summer solstice, health care should focus on preventing heatstroke. However, what is heat stroke? In fact, there are two types of heat stroke in Chinese medicine, one is called “Yang heat stroke” and the other is called “Yin heat stroke”, which are very different and often confused. ”Yang heatstroke” is more in line with the ordinary people’s sense of “heatstroke”, but you can not use patchouli water. It is characterized by a hot day out, excessive activity, hot sun, excessive sweating, insufficient water, resulting in heat poisoning Yin, and manifests as headache, irritability, great heat, great thirst, great sweating, floating pulse, panting, or no gas to move. The treatment requires clearing heat and nourishing yin, with dietary therapy such as eating watermelon, boiling soup with watermelon cui yi or drinking mung bean soup, etc. The medicine can be Bai Hu Tang (raw gypsum, japonica rice, Zhi Mu, licorice), or Yi Yuan San (talc, licorice). If the sweating pulse is weak and floating, and the thirsty person has fire and less qi, it is advisable to add ginseng to Bai Hu Tang, or Zhong Jing bamboo leaf and gypsum soup. One thing we must pay attention to is that modern society has improved living conditions, people mostly live indoors and work, and there are air conditioners and fans and other cooling conditions, so there are not many opportunities to really get this “Yang summer heat”, except in the hot summer strenuous outdoor activities such as playing soccer, climbing, physical labor, etc.. Another type of heatstroke is called “yin heatstroke”, which can be treated with patchouli, but most ordinary people do not know how to identify it. The main reason for this is the external or internal cold that occurs in modern cities, such as the wind and cold due to the desire for air conditioning, the wetness from rain, the dampness of the spleen and stomach due to the desire for cold drinks, in short, the external cold and internal dampness. The symptoms are fever and headache, no sweat and bad cold, anxious body shape and sore limbs, or vomiting, diarrhea and abdominal pain. The treatment of Yin summer heat requires pungent, warm and open dispersal, and Huo Xiang Zheng Qi Shui is very suitable. In modern cities, people have more chances to get air conditioning disease, so the summer is more wind-cold disease, taking Huo Xiang Zheng Qi is often effective. It can be seen that there is a big difference between Yang and Yin summer heat. It is wise to have some patchouli at home in the summer, but it must be used in cold and dampness, in Yin and summer, never the other way around.