In the vast majority of cases, mugwort has no particular effect on children, unless there is an allergy to the odor or ingredients of mugwort, most children can tolerate mugwort. Especially in the case of cold and flu as well as anorexia, even mosquito bites, eczema, etc., the application of mugwort bath to children at this time can provide good relief for the above mentioned illnesses. Wormwood bath belongs to the external method, very suitable for younger children, children before the age of three years old to take traditional Chinese medicine is more difficult, the application of wormwood bath external way, not only can cure the disease, but also easy for children to accept, and can treat children’s common diseases.