There is a reason why moxibustion and physical therapy need to use Ai Chen for more than three years. It is recorded in Compendium of Materia Medica that whoever uses mugwort leaves must use Chen Jiu, which is called cooked mugwort. If moxibustion fire is born, it will hurt the tendons and arteries. ............. Chen Jiufang is available.

Mencius on Li Lou said: seven years of illness, three years of love.

In the first year, the content of flavonoids and arborvitae in the essential oil of wormwood is high, which is called non-aging raw wormwood. Therefore, moxibustion can't use raw moxa sticks, which is easy to "hurt the bones". Generally speaking, Ai Chen has been used for more than three years.

Advantages of Chen Ai: After three years of aging, essential oil, flavonoids, arborvitae leaves and other components have evaporated. There is little moxa oil, which burns slowly and has mild firepower. After burning, there is less smoke and the moxa ash is not easy to fall off. However, new love does not have these advantages. Artemisia argyi has a strong smell, contains a large amount of volatile oil, and has a fast burning speed and strong firepower. After burning, there is a lot of smoke, and the ash of Artemisia argyi is easy to fall off, which is easy to hurt blood vessels. So it is best to have Ai Chen for three years.