Mentha piperita can be used for redness of the eyes with excessive tears, sore throat, rubella and itching. It is usually taken in decoction, or in pills or powder, and used externally by decocting appropriate amount of water, or pounding the juice and applying. Mentha piperita is a medicinal substance, as a traditional Chinese medicine, the medicinal properties of pungent, cool. It belongs to the liver and lung meridians, and has the effects of clearing the head and eyes, transmitting rashes, evacuating wind-heat, relieving pharynx and resolving depression, etc. It can be used for wind-heat attacking the head, red eyes with excessive tearing, headache and dizziness, sore throat, paralysis of the throat (redness, swelling and pain in the pharynx or dryness, with a feeling of a foreign body, or itching and discomfort in the pharynx and difficulty in swallowing), and sores on the mouth and tongue; This product can also be used for distension of the chest and hypochondrium (a collective term for the chest and rib area), liver depression and stagnation of qi (poor transportation of qi and blood in the liver, emotional depression); wind-heat colds and the first signs of a warm disease, which are commonly used to evacuate wind-heat; itchy rubella, impenetrable measles, and so on. This product is usually decoction should be taken after the next, should not be used by those who are weak and sweaty, adverse reactions are not yet clear. Please do not use the drug by yourself to avoid adverse reactions.