May Ease Digestive Upsets. Peppermint may relieve digestive symptoms, such as gas, bloating and indigestion.May Help Relieve Tension Headaches and Migraines. ...May Freshen Your Breath. ...May Relieve Clogged Sinuses. ...May Improve Energy. ...May Help Relieve Menstrual Cramps. ...May Fight Bacterial Infections. ...May Improve Your Sleep.