The use of peppermint should first clarify the indications and contraindications, the use of decoction soup for internal use, not for a long time, or powder into the pills, or decoction soup or external washing or pounding the juice of the compress. Peppermint is cool in nature, pungent in flavor, with the effect of dispersing wind-heat, clearing the head and eyes, and facilitating the pharynx and rash (facilitating the pharynx and rash), it is suitable for external wind-heat, which is characterized by swollen and sore throat, chills and fever, etc.; as well as liver-heat attacking the liver or liver-yang over-excessive (liver-yang is over-exuberant, which causes dizziness, dizziness, and headache), which is characterized by headache and redness of the eyes. Mentha piperita is also indicated for the distension and pain of the ribs and dermatitis of liver-qi stagnation (poor transportation of qi and blood in the liver, emotional depression), as well as impenetrability of measles and itching of rubella. Note that it is contraindicated for those with superficial deficiency and excessive sweating. The dosage of peppermint is 3~6g in decoction, because the active ingredients of peppermint are volatile, so it should not be decocted for a long time, it is advisable to decoct with other medicines, and it is advisable to decoct with other medicines; it can also be dried and powdered into pills and dispersions; or decocted with water for external washing or pounded juice for external application. If you want to use peppermint, it is recommended to ask your doctor first and use it under the doctor’s guidance.