A 30-year-old male reports a tingling sensation followed by a rash that is painful and spreading around the back. Which condition is most likely?

• A. Contact Dermatitis
• B. Impetigo
• C. Shingles
• D. Psoriasis

Answer: (C)

Tingling or burning followed by a painful, vesicular rash in a band-like pattern along a specific area of the body is the hallmark of shingles (herpes zoster), caused by reactivation of varicella-zoster virus that lies dormant in dorsal root ganglia. The prodromal neural symptoms—such as tingling—often precede the rash by a day or two, and the eruption typically follows a single dermatome, usually on the trunk or back, and is usually limited to one side rather than crossing the midline. This combination of neuropathic symptoms before a unilateral dermatomal vesicular rash is what distinguishes shingles from other skin conditions.

In this scenario, the back isn’t just a random spread of a rash; it aligns with a single thoracic dermatome, and the preceding tingling points to neural involvement from viral reactivation. By contrast, contact dermatitis would present as localized, itchy erythema and vesicles at a site of contact without the dermatomal pattern or preceding neuropathic sensation. Impetigo shows honey-colored crusts from a bacterial infection, not a neuropathic prodrome. Psoriasis presents as chronic, well-demarcated plaques with silvery scales, not a painful, vesicular, dermatomal eruption.

So the best explanation for this presentation is shingles due to reactivated varicella-zoster virus.