Mugwort ash is the ash produced after the burning of Mugwort leaves and does not have efficacy and effect, nor is it contraindicated. It is only when the leaves are used raw or fried into moxa charcoal that it has the effect of medicine. Mugwort leaves are the dried leaves of the plant Mugwort in the family of Asteraceae, with pungent and bitter flavor, warm nature, small poison, and attributed to the liver, spleen and kidney meridians. It has the effect of warming the meridians to stop bleeding (warming the meridians of the body to stop bleeding in the body), dispersing cold and relieving pain (relieving pain by dispelling cold in the body) when taken internally, and dispelling dampness and relieving itching when used externally. Mugwort leaves can be used internally to treat vomiting of blood, epistaxis, metrorrhagia (excessive menstrual flow or dripping), excessive menstrual flow, fetal leakage (small amount of vaginal bleeding in the early stage of pregnancy), hyperemia, cold pain in the lower abdomen, irregular menstrual cycles, and cold uterus and infertility; and externally it can be used to treat itching of the skin. Vinegar moxa charcoal warms menstruation and stops bleeding, used for deficiency cold bleeding. Adverse reactions and contraindications of Ai Ye are not clear, it is recommended to use the drug correctly under the guidance of a doctor.