The danger of mint leaves in water is that it is easy to sweat and consume qi. Peppermint leaves are the above-ground part of the mint plant of the Lamiaceae family, taste pungent, cool, to the lung, liver meridian. Its effects include dispersing wind-heat, clearing the head and eyes, facilitating the pharynx and penetrating the rash (facilitating the pharynx and penetrating the rash), in addition to the efficacy of the liver and the flow of qi. It can be used to treat wind-heat colds, the first signs of warm diseases, wind-heat headache, redness of the eyes and tears, sore throat, impenetrable measles, itchy rashes, liver depression and stagnation of qi (poor transportation of qi and blood in the liver, emotional depression), chest tightness and coercion (pain in the area of the coercion and ribs). Dietary contraindications should not consume food that is warm and hot in nature, avoid turtle meat. Precautions are that this product is aromatic and pungent, sweating and exhausting, so it should not be used by those who are weak and sweaty. Mentha piperita has the danger of sweating and consuming Qi, so it should not be used by people with excessive sweating. If there is a need for medication, need to be used under the guidance of a doctor to identify the evidence, do not blindly use their own medication, so as not to cause adverse consequences.