Chen Ai, i.e., longer storage time of mugwort leaves, its brewing and drinking may have the effect of warming menstruation and stopping bleeding (warming the body’s meridians to stop bleeding in the body), dispersing cold and relieving pain (relieving pain by dispelling the cold in the body), and it can mainly treat vomiting of blood, epistaxis, disintegration (excessive menstrual flow or more than a few drops), and menstrual bleeding and other conditions. Mugwort leaf, bitter, pungent, warm in nature; slightly poisonous. It belongs to the liver, spleen and kidney meridians. Clinically, it is mostly used for treating fetal leakage (small amount of vaginal bleeding in early pregnancy), hemorrhage, cold pain in the abdomen, cold menstruation, cold uterus and infertility, etc.; and externally for treating itching of the skin. Vinegar moxa charcoal can warm menstruation to stop bleeding, used for cold bleeding. Although mugwort leaves have the above effects, soaking them in water may cause insufficient release of their active ingredients, thus reducing their efficacy. In addition, if moxa leaves are left for too long, the active ingredients may also be reduced. It is recommended that the medicine be used in accordance with medical advice.