Which contagious infection presents with vesicles on an inflamed base around the lips?

Which contagious infection presents with vesicles on an inflamed base around the lips?

• A. Herpes simplex
• B. Miliaria rubra
• C. Impetigo
• D. Rosacea

Answer: (A)

Vesicles on an inflamed base around the lips point to herpes simplex infection (cold sores). The hallmark is grouped vesicles sitting on a red, inflamed area near the mouth, and the infection is highly contagious through direct contact. The virus can remain dormant in the trigeminal nerve and reappear at the same site with triggers like sun exposure, stress, or immune changes. Antiviral treatment can shorten the course and lessen symptoms, and avoiding contact during outbreaks helps prevent spread. Miliaria rubra is a heat-related rash with small red bumps from blocked sweat ducts, not vesicles on an inflamed perioral base. Impetigo typically shows honey-colored crusts after fragile blisters, rather than clustered vesicles on an inflamed base. Rosacea features persistent facial redness and visible blood vessels with possible papules but not vesicular lesions around the lips.

Vesicles on an inflamed base around the lips point to herpes simplex infection (cold sores). The hallmark is grouped vesicles sitting on a red, inflamed area near the mouth, and the infection is highly contagious through direct contact. The virus can remain dormant in the trigeminal nerve and reappear at the same site with triggers like sun exposure, stress, or immune changes. Antiviral treatment can shorten the course and lessen symptoms, and avoiding contact during outbreaks helps prevent spread.

Miliaria rubra is a heat-related rash with small red bumps from blocked sweat ducts, not vesicles on an inflamed perioral base. Impetigo typically shows honey-colored crusts after fragile blisters, rather than clustered vesicles on an inflamed base. Rosacea features persistent facial redness and visible blood vessels with possible papules but not vesicular lesions around the lips.