Traditional Chinese medicine believes that the five elements belong to fire on the ninth poison day in May, when the yang is strong and the fire is extremely prosperous. At this time, the yang is scattered outside, weak inside and the environment is hot and humid. With a little carelessness, the disease can take advantage of it. Therefore, it is very necessary to avoid a lot of consumptive activities, such as eating cold drinks, sweating, sex life and so on. From the analysis of some modern phenomena, the monthly temperature in Wudu rises rapidly, the weather is hot, the rainy season is coming, the air is humid, the circulation is not smooth, and the evil of damp heat is flourishing. At this time, pathogenic microorganisms proliferate, toxic cockroaches breed, and they are also very prone to illness.
The ancients also came up with many ways to deal with the poisonous moon and spend the summer safely. For example, picking Artemisia argyi leaves and other medicinal materials to hang, wear and take, and choosing some foods with high medicinal value, so as to detoxify and ward off evil spirits, prevent diseases and strengthen the body. You will also insert moxa sticks in front of the door, drink realgar wine, soak in wormwood bath, eliminate evil and filth, and keep healthy and prevent diseases.