The vesicle cluster visible on the corner of this patient's vermilion border is also referred to as a cold sore or fever blister. This is called:

Question

The vesicle cluster visible on the corner of this patient's vermilion border is also referred to as a cold sore or fever blister.  This is called:

Quizplus · Accepted Answer

The vesicle cluster on the patient's vermilion border is most likely caused by the herpes simplex virus, which commonly causes cold sores or fever blisters. This manifestation is specifically called herpes labialis. Primary herpes may also present with similar symptoms, but it typically involves multiple painful lesions throughout the mouth and throat. Aphthous ulcers, on the other hand, are not caused by the herpes simplex virus and typically present as single, painful ulcers inside the mouth. Herpetic whitlow is a herpes simplex virus infection of the fingers and is unlikely to present with vesicles on the lips.

The Vesicle Cluster Visible on the Corner of This Patient's