Fever Blister

Fever blister, also known as herpes labialis, refers to an infection of the mouth, gums or lips due to an exposure to the Herpes simplex virus type 1, which paves way for the growth of small yet painful blisters, termed as fever blisters or cold sores. Initially there might be no symptoms or just mouth ulcers, while the virus remains inactive within the nerve tissue of the face. In few people though, the virus reactivates and releases recurrent cold sores mostly in the same area, but harmless. Genital herpes caused by herpes virus type 2 may affect babies at their birth or their mothers, and can also form fever blister.