Most of the time, the best cold sore treatment is with over-the-counter products and at-home care. Try:
Using a cold compress to ease discomfort.
Applying over-the-counter creams and ointments. Look for products that contain docosanol or benzyl alcohol.
Avoiding spicy or salty foods and acidic foods like tomatoes or citrus fruits. They can further irritate your cold sore.
Taking acetaminophen (Tylenol) or ibuprofen (Advil) to help the pain.
Wearing sunscreen. Lip balm with an SPF (sun-protection factor) of 30 or higher will help protect your lips while they heal.