Final answer:
The most likely finding in a patient with herpes labialis is fever blisters, caused by HSV-1, typically presenting on or around the lips.
Step-by-step explanation:
The correct answer to the question regarding the presentation of a patient with herpes labialis is B. Fever blisters. Herpes labialis, also known as cold sores, is primarily caused by the herpes simplex virus type 1 (HSV-1). These fever blisters frequently appear on or around the lips and are characterized by small, painful, fluid-filled blisters that may crust over during the healing process. HSV-1 can also lead to acute herpetic gingivostomatitis, creating ulcers inside the mouth. Treatment, when necessary, can involve antiviral medications such as acyclovir, famciclovir, or valacyclovir. It's important to note that HSV-1 is highly contagious and can be spread through direct contact even without visible lesions.