Peppermint is an aromatic herb, a cross between watermint and spearmint. People reach for it to ease occasional digestive discomfort like bloating and gas. Diluted essential oil rubbed on the temples can soothe tension headaches, and inhaling the scent helps with head tension or stuffy noses. You can find it as a tea, a capsule, or an enteric-coated oil.
A note of caution: peppermint oil relaxes the lower esophageal sphincter. For some, that spells heartburn. Enteric-coated capsules help bypass that problem. If you use the essential oil on skin, always dilute it with a carrier oil first to avoid irritation.