Peppermint can be used to treat cough. Peppermint, also known as Yin Dan Cao, belongs to an herbal medicine that has the effects of cooling the exterior, relieving pain in the throat, relieving itching, clearing heat and detoxifying the body, and generating sweat. Peppermint contains a number of chemical nutrients, including menthol, menthone, limonene, camphorene and others. These rich nutrients can strengthen the body’s immunity, and can inhibit the entry of pathogens such as viruses and bacteria, and protect the mucous membrane of the respiratory tract. Therefore, peppermint is good for treating cough, but it is generally used clinically to treat headache, sore throat and cough caused by influenza and common cold, bronchitis, etc.