Picture of Herpes Blister (Cold Sore)
Cold sores are blisters that arise in the mouth or on the face. They result from infection with herpes simplex type 1 virus. The blisters may be associated with burning, itching, and pain. They eventually burst and form a crust. The lips, nostrils, chin, and cheeks are common locations for outbreaks. The virus lies dormant in the body but factors like stress, illness, and sunburn may trigger the formation of new blisters. Wearing lip balm containing sunscreen can help prevent outbreaks. It is important to avoid close contact with others during outbreaks as the virus is highly contagious.
Text Reference: The Journal of Dermatological Treatment, vol. 24, 2013: "Patterns of Disease and Treatment of Cold Sores"