- 1). Apply 3 to 4 drops of peppermint oil to a damp cloth and apply to the forehead to treat headaches. The few studies done on this approach have been small, so the amount and timing have not been unambiguously established.
- 2). Treat skin irritations caused by poison ivy, poison oak and hives with peppermint oil for a cooling and soothing effect. Dilute to 20 percent or less with a carrier oil before applying broadly over the rash.
- 3). Apply peppermint oil to the chest to treat symptoms of colds and influenza. The menthol in the oil soothes dry coughs and thins mucus to promote breathing. Dilute to 20 percent or less with a carrier oil before application.
- 4). Massage into muscles after exercise to help them loosen. Dilute to 20 percent or less with a carrier oil before application.
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