Patchouli can be taken internally or used externally. Externally, it is mainly used for eczema, itchy skin, mosquito bites, children’s prickly heat and other diseases, and has a wide range of uses in dermatology. When treating eczema, patchouli can be applied directly to the affected area, usually 3-5 times a day, the course of treatment for 3-5 days, that is, with good results. For the treatment of mosquito bites, patchouli can be applied directly to the affected area for half an hour to stop the itching; for the treatment of children’s prickly heat, it should be diluted with cool water in different proportions according to the age of the child and applied directly to the affected area. Internally, it is mainly used for vomiting, diarrhea, heat stroke, motion sickness, seasickness, etc.