Peppermint is a hybrid mint, a cross between watermint and spearmint. The leaf and oil are used as medicine. Peppermint oil is used for a long-term disorder of the large intestines that causes stomach pain (irritable bowel syndrome or IBS). It is also used for indigestion , spasms in the bowel, hard, painful breasts in breast-feeding women, bed sores, and tension headache.
In foods and beverages, peppermint is a common flavoring agent.