Blistex Cold Sore Cream is a clinically proven cream for the treatment of cold sore an infection from the virus Herpes Simplex 1. Stress factors and cold often results in cold sores. The unique active ingredient docosanol is very effective in treating the cold sores and bringing relief within a small time. Docosanol stop the cold sore and prevent the virus from spreading. It is a soothing cream with cooling action. It removes any itchiness or irritation casued by cold sores and hence heals the infection within a few days such as 4-6 days.Apply the cream on the affected area after every 3-4 hours.