Reduces Fatigue, Improves skin, Relieves pain, Improves cold symptoms, Feels energized, Treats acne, Heals wounds, Improves Alertness, Prevents Dandruff, and Boosts Immune System. Mix 1 drop of lemon oil with any carrier oil. Apply to a cotton ball and gently dab on the affected area of the skin. Leave on for 2 to 5 minutes. Wash your face with your usual cleanser. Diffuse Lemon when the atmosphere is melancholy for a boost of cheer. Use three to four drops in the diffuser of your choice.