Peppermint can be used in decoction and is preferred to be taken later. It can be used for redness of the eyes with excessive tears, sore throat, distension of the chest and ribs, and itching of rubella. Mentha piperita is the dried above-ground part of Mentha piperita, family Labiatae, which is pungent in flavor, cool in nature, and belongs to the lung and liver meridians, and has the efficacy of evacuating wind-heat, inducing diaphoresis, clearing the head and eyes, transmitting rashes, and promoting the flow of qi and dredging the liver. It can be used for wind-heat colds and the beginning of warm diseases, and is often paired with honeysuckle, forsythia, burdock, etc. to treat wind-heat colds or the beginning of warm diseases, and evil in the Wei division. It can also be used for wind-heat attack, paralysis of the throat (red, swollen and painful throat, or dryness, foreign body sensation, or itchy throat, discomfort, difficulty in swallowing), eye redness and tearfulness, headache and dizziness, mouth and tongue sores, sore throat; liver stagnation and stagnation of qi, chest and hypochondrium; rubella itching, measles impenetrable. Mentha piperita can be decocted and used, preferably after the next, or into the pill, bulk. It can also be used externally by decocting and washing with water or pounding the juice and applying. This product should not be used by people with body weakness and excessive sweating, and the adverse effects are not clear. Patients are advised to consult a doctor in time if they feel unwell.