Skin Care: Dilute 1-2 drops of spearmint essential oil in a carrier oil (such as almond oil), then apply the diluted oil to the skin and massage for a few minutes to improve your skin's texture. Purifying the air: The sweet, fresh scent of spearmint essential oil itself has a purifying and uplifting effect. Simply add 3-4 drops of spearmint oil to the diffuser. More Uses: Spearmint essential oil can be used in diffuser, spray bottles, creams, and when used on the skin it needs to be diluted with a carrier oil such as almond oil, coconut oil, jojoba oil, etc.