Premise: How to get rid of a cold sore with home remedies<br>Use hydrogen peroxide. Hydrogen peroxide has antiseptic and antiviral properties that can help reduce inflammation and fight the viral infection causing the cold sore. [substeps] Soak a cotton ball or cotton swab in one teaspoon of hydrogen peroxide and hold it directly over the cold sore for five minutes.
Hypothesis: Hydrogen oxide is the main ingredient in this home remedy.