7. Lavender Oil
Lavender is considered to be the most versatile of essential oils. It has anti-microbial, anti-fungal, and anti-inflammatory properties, which can help treat cold sores. Mix a few drops of lavender oil with olive oil; dip a clean cotton swab in the mixture and apply directly to the cold sore. Apply it as soon as you recognize the first signs of pain or tingling that tell you a cold sore is on the way. Re-apply the solution several times a day until the sore is gone.