What is a cold sore?
A cold sore is a blister that forms on or around the lips and is usually caused by an infection from a virus called Herpes Simplex 1 (HSV-1). Most sufferers are likely to have had HSV-1 since childhood.
To begin with, sufferers feel symptoms such as a tingling, itching or burning sensation on the lip. The blister usually appears within the next 24 hours and can take up to 10 days to heal fully.
Cold sores are contagious, therefore sufferers need to take care not to infect others. Unfortunately, there’s no cure for cold sores, but if applied at first tingle, Blistex Cold Sore Cream effectively penetrates the skin to help block the virus from entering healthy cells.