Mugwort ash is the ash left after burning mugwort leaves, also known as mugwort charcoal, which has the effects of warming menstruation and stopping 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), and externally treating itching of the skin. 1. Warming menstruation and stopping bleeding: Wormwood ash is pungent in flavor and warm in nature to disperse cold. Wormwood ash can warm the qi and blood, warm the meridians, therefore, it can be used for treating cold uterus and infertility, vomiting blood, epistaxis, metrorrhagia (excessive menstruation or dripping) menstrual bleeding, and bleeding in pregnancy. 2. Dispersing cold and relieving pain: it can be used to treat cold pain in the lower abdomen and abdominal pain during menstruation. 3. Stop itching: mugwort ash has the effect of stopping itching, for example, after we are bitten by mosquitoes, we can use mugwort ash to reduce swelling and stop itching. Wormwood ash for pregnant women, Yin deficiency blood heat, allergies, bleeding disorders should be prohibited from using, note that wormwood has a small toxicity, after taking may have adverse reactions such as gastrointestinal discomfort, pain, general weakness, dizziness, tinnitus, tremor of the limbs, generalized spasms, muscle flaccidity and so on. If necessary, it is recommended to go to the hospital and follow the medical advice to regulate the use.