Here are 10 benefits of rosemary oil for the skin:

1. Fights acne. Rosemary oil has antibacterial and anti-inflammatory properties that can help fight the bacteria that cause acne. It can also help to unclog pores and reduce inflammation, which can help to prevent future breakouts.
2. Reduces fine lines and wrinkles. Rosemary oil is a natural antioxidant, which means it can help to protect the skin from damage caused by free radicals. Free radicals are unstable molecules that can damage cells, leading to premature aging. By reducing free radical damage, rosemary oil can help to smooth out fine lines and wrinkles.
3. Improves skin texture. Rosemary oil can help to improve the overall texture of the skin by reducing the appearance of scars, blemishes, and age spots. It can also help to tighten and tone the skin, giving it a more youthful appearance.
4. Promotes hair growth. Rosemary oil has been shown to promote hair growth in some studies. It is thought to work by stimulating the circulation to the scalp and by strengthening the hair follicles.
5. Prevents wound scarring. Rosemary oil can help to speed up the healing of wounds and prevent scarring. It has anti-inflammatory and antimicrobial properties that can help to keep the wound clean and free of infection.
6. Purifies the skin. Rosemary oil has astringent properties that can help to tighten and tone the skin. It can also help to remove excess oil and dirt from the skin, which can help to prevent breakouts.
7. Protects from sun damage. Rosemary oil has antioxidant properties that can help to protect the skin from damage caused by UV rays. This can help to prevent premature aging and skin cancer.
8. Boosts circulation. Rosemary oil can help to improve circulation to the skin. This can help to deliver nutrients to the skin cells and remove toxins, which can help to improve the overall health of the skin.
9. Reduces stress. The aroma of rosemary oil has been shown to reduce stress and anxiety. This can be beneficial for the skin, as stress can contribute to acne and other skin problems.
10. Improves mood. The aroma of rosemary oil has also been shown to improve mood and cognitive function. This can be beneficial for the skin, as stress and anxiety can contribute to premature aging.

It is important to note that rosemary oil should always be diluted with a carrier oil before applying it to the skin. This will help to prevent skin irritation. Rosemary oil should also be avoided if you are pregnant or breastfeeding.

If you are interested in using rosemary oil for your skin, it is important to talk to your doctor or a qualified aromatherapist first. They can help you to determine if rosemary oil is right for you and how to use it safely.