Peppermint oil’s cooling power comes from the high percentage of menthol in its leaves. Menthol has antibacterial properties and is used externally to stimulate nerve endings and increase blood flow. Peppermint oil is ideal for improving skin texture and clearing up blemished skin. It is a good treatment for eczema, dermatitis, inflammation, muscle aches and dandruff. In hair care products, peppermint oil refreshes and stimulates the scalp promoting blood circulation which stimulates growth. Its cooling menthol content also makes it an excellent remedy for itching and dryness.