Mugwort leaves are pungent and bitter in taste and warm in nature. They are associated with the liver, spleen, and kidney meridians. The main effects are warming the meridians to stop bleeding, dispelling cold to relieve pain, and externally used to remove dampness and relieve itching. Neonatal jaundice is one of the common symptoms in newborns, mainly divided into types such as damp-heat stagnation, cold-damp obstruction, and qi stagnation and blood stasis. If the early jaundice is characterized by obvious yellowing of the skin, reduced frequency of stools, and yellow urine, it generally belongs to the damp-heat stagnation type of jaundice. In this case, mugwort leaves should not be used for bathing. If the complexion is yellow and the color is dull and persistent, the child appears listless, the limbs are cold, the stools are loose, and the urine output is reduced, then it is categorized under the cold-damp obstruction type. This usually indicates weakness of the spleen and stomach, heavy dampness, and signs of cold. In such cases, bathing the baby with mugwort leaves can be beneficial as it warms the meridians and dispels cold. Therefore, the use of mugwort leaf baths for newborn jaundice should be based on the specific condition of the baby, and only those with cold-damp type jaundice should use mugwort leaf baths.