Wild mint likes warmth and dampness, and is distributed throughout the north and south of China, and is not essentially different from the modern Chinese mint. It can treat wind-heat colds and summer heat and dampness. In addition, it can also treat sore throats and itchy skin caused by external wind, and it has the effect of draining the liver and moving qi. Modern pharmacological research shows that the main substance in peppermint is volatile oil, the composition of which is menthol, which can act on the central nervous system, dilate capillaries, play an anti-inflammatory and analgesic effect, soothe the liver and wake up the brain.