Mugwort water usually refers to water infused with mugwort leaves. Ai water bath has the effect of dispersing cold and dampness, warming the meridians and collaterals, and relieving itching, and is mainly used externally for the treatment of itchy skin and so on. Mugwort is the leaves of the plant Artemisia absinthium of the family Asteraceae, warm, bitter taste, with warm menstruation to stop bleeding, safe pregnancy, expel cold dampness, qi and blood, etc., the external use of the efficacy of eliminating dampness and relieving itching, commonly used in the treatment of itchy skin, etc.. External use of this medicine should be appropriate amount, you can moxibustion treatment or fumigation with. Ai water bath can dispel dampness and relieve itching. The temperature of the bath should not be too high, and women should not take a bath during menstruation to avoid causing adverse reactions. When discomfort occurs, it is necessary to actively seek medical attention, follow the doctor’s instructions for reasonable treatment, do not use private medication, so as not to cause damage to the organism.