Herpes labialis

In medicine, Herpes labialis is herpes simplex, caused by [[Human herpesvirus 1]|type 1 virus]], primarily spread by oral secretions and usually occurring as a concomitant of fever. It may also develop in the absence of fever or prior illness. It commonly involves the facial region, especially the lips and the nares.

Cold sores are most commonly caused by Human herpesvirus 1 and are ubiquitous in distribution in human populations. Here, the vesicles have crusted over and begun to heal.