Rosemary oil is herbaceous, sweet, and slightly camphorous in aroma. Rosemary oil is a stimulant, and it should be used with caution. It can help increase circulation and relieve pain in the joints. Rosemary can help control dandruff, oily scalp and skin, acne, and is said to encourage hair growth. Try blending with: Lemongrass, peppermint. Avoid during pregnancy or if you suffer from high blood pressure.