Lavender oil, the essential oil obtained from the lavender plant, provides benefits for skin care, hair care, insect bites and sunburn. Lavender oil, which provides calming and psychological relief with its scent, is known as an essential oil that has been used in alternative medicine for years with its antiseptic effect. Lavender oil is also believed to treat anxiety, fungal infections, allergies, depression, insomnia, eczema, nausea, and menstrual cramps.