With the primary infection HSV-1 invades the skin, and causes a primary infection, which usually occurs in early in life. Symptoms may include a fever, sore mouth and sore throat along with burning and stinging. The primary infection often is similar to other viral infections, and often is not correctly diagnosed as an HSV-1 infection.
After this primary infection clears, the virus remains dormant indefinitely in nerve roots near the affected skin area. In some people, the virus becomes active again and causes new active sores on the skin, usually on the lip. These sores have become known as cold sores or fever blisters because the virus can be reactivated by a cold or fever. The virus also can be triggered to become active again by other factors, including stress, trauma to the lips, and exposure to the sun's ultraviolet rays, menstruation and suppression of the immune system.
There are several over the counter herpes tablets, that work very well as a daily suppression theropy to control the cold sore outbreaks.