6. Oregano Oil
The natural oils in oregano are powerfully antimicrobial, and researchers discovered the essential oils from Turkish oregano provided antioxidant, antimicrobial, and antiviral properties. Apply a couple of drops of oregano combined with a carrier oil using a cotton swab several times daily. Application of oregano oil to cold sores can help to reduce swelling and promote faster healing by killing the virus inside the blisters. Note: Because oregano oil in its pure form is highly concentrated and may cause skin irritation if applied directly. For topical, always dilute with a carrier oil.