Take an appropriate amount of dried mint leaves in a cup and drink it with boiling water. However, the dose of dried mint leaves in water does not usually have a therapeutic effect. So in order to be used in medicine to treat diseases, you also need to have a professional doctor’s diagnosis and prescription. Dried mint leaves are pungent in flavor and cool in nature. It belongs to the lung and liver meridians. It has the efficacy of dispersing wind-heat, clearing the head and eyes, facilitating the pharynx, transmitting rashes, dredging the liver and promoting the flow of qi. It is used for wind-heat colds, the first signs of wind-warmth, headache, eye redness, paralysis of the throat (throat redness, swelling and pain, or dryness, foreign body sensation, or throat itching and discomfort, difficulty in swallowing), mouth sores, rubella, measles, chest and ribs (chest and ribs) distension and stuffiness, and so on. It should be noted that it is contraindicated in cases of yin deficiency and blood dryness (deficiency of yin fluid, dryness and heat in the blood), hyperactivity of liver yang, and excessive sweating of the exterior. Before using dried peppermint leaves in water, you need to have the guidance of a professional doctor to identify the symptoms.