Its name derives from the Latin root “lavare,” which literally means “to wash.” The earliest recorded use of lavender dates back to ancient Egypt where lavender oil played a role in the mummification process. During later times, lavender became a bath additive in several regions, including Persia, ancient Greece, and Rome. These cultures believed lavender helped purify the body and mind. Today, aromatherapists use lavender to treat headaches and nervousness or restlessness. Massage therapists sometimes apply lavender oil to the skin, which might function both as a calming agent and a sleep aid.