Herpes vs. Cold Sores vs. Shingles: Viral Differences and Clinical Features

Herpes is a virus family causing diverse lesions. Key distinctions:

• Cold sores (fever blisters): Caused by HSV-1. Highly contagious via kissing, shared items, direct contact. Virus remains dormant in nerve ganglia and reactivates recurrently.
• Shingles (herpes zoster): Caused by varicella-zoster virus (VZV)—the same virus as chickenpox. After chickenpox, VZV lies dormant in dorsal root ganglia. Reactivation (often decades later) produces a painful, dermatomal rash.

Both are “herpes-associated diseases” but differ in causative virus, latency site, and clinical presentation. Understanding differences aids prevention, diagnosis, and treatment.

For details, visit the CDC herpes page.