The way to make mint water is to wash the mint with water and put it into a teapot, brew it with warm boiled water, cover it with a lid and let it steep for a certain period of time before taking it. Peppermint infusion can relieve headache, eye redness, paralysis of the throat (throat redness, swelling and pain, or dryness, foreign body sensation, or throat itching discomfort, difficulty swallowing), mouth sores and other symptoms. Mentha piperita, pungent flavor, cool in nature, into the lung, liver meridian, with the evacuation of wind-heat, clearing the head and eyes, diaphoretic, through the rash, the efficacy of the liver to move qi, used for the treatment of wind-heat colds and flu, wind temperature at the beginning of the headache, redness of the eyes, paralysis of the larynx, sores in the mouth, rubella, measles, chest and ribs (chest and ribs part of the collective term) distension and congestion. It should be noted that yin deficiency and blood dryness (deficiency of yin fluid, dryness and heat in the blood), liver yang hyperactivity, surface deficiency and sweating should be avoided. Although peppermint has the above effects, the effective dosage of infused water is limited, it is difficult to achieve the above effects, it is recommended to take peppermint as prescribed by the doctor.