Mentha piperita is used medicinally by collecting the fresh product and then drying it for use, and its proper use is to take it internally in water decoction, and this product should be put down afterward. Mentha piperita belongs to the pungent and cool products, with the efficacy of dispersing wind-heat, dispersing liver qi, clearing the head and eyes, etc. It can treat wind-heat and cold, headache and dizziness, sore throat, rubella and itchiness, and stagnation of liver qi. The adverse effects of this drug are not clear; it is contraindicated in patients with body weakness and excessive sweating; it is used with caution in people with weak spleen and stomach. The medicinal part of peppermint is the dried above-ground part, so it should be dried and used after collecting the fresh product, and its correct method of use is to decoct the soup and take it internally, and it should be put down afterward. If you need to use peppermint, you need to standardize the use under the guidance of a traditional Chinese medicine practitioner, do not self-medication.