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WARNING!
I have seen some people writing in remedies that include putting undiluted essential oils on their skin. I think I saw a remedy for headaches or migraines that recommended putting peppermint essential oil on the temples. I have been studying aromatherapy for 5 years, and one of the most basic lessons is that you almost NEVER use essential oils undiluted. Peppermint essential oil in particular is considered to be a skin irritant to all skin types when used undiluted. If put on the temples, the strength of the fumes could seriously irritate the eyes and the delicate area around the eye. If you are going to try any remedy including essential oils, DILUTE FIRST! Even if the remedy doesn't specify it, you'll be saving yourself from possible complications.