The efficacy of mugwort water for bathing babies is to dispel dampness and relieve itching, and it works to treat itchy skin. The specific application should be used under the guidance of a doctor. Mugwort is a pungent and warm herb with a small toxicity. The effect of internal use is to dissipate cold and relieve pain (by removing the cold in the body to relieve pain), warm menstruation and stop bleeding (warming the body’s meridians to stop bleeding in the body); external use to dispel dampness and relieve itching. Therefore, the efficacy of moxa leaf water to bathe the baby is mainly to dispel dampness and relieve itching. Mugwort leaf decoction for internal use is to treat cold bleeding symptoms such as excessive menstruation, metrorrhagia (excessive menstrual flow or more than a few drops), fetal leakage (a small amount of vaginal bleeding in early pregnancy), hematemesis, vomiting blood, nosebleeds, cold menstrual disorders, cold uterus, infertility, cold pain in the abdomen (abdomen); external use to cure itching of the skin. The main function of boiling water with mugwort leaves to bathe babies is to treat itchy skin of babies. Note that mugwort leaves should be used with caution for people with Yin deficiency and blood heat (restlessness at night, irritable heat, red lips, dry throat and mouth). It should be used reasonably under the guidance of a doctor.