Herpes zoster
Shingles (herpes zoster) occurs when the virus that previously caused chickenpox becomes active again in the body. It usually causes a painful rash on one side of the body. Risk increases with age and a weakened immune system. Some people develop long-lasting nerve pain, and disease affecting the eye can harm vision.
Prevention: Mixed
Symptoms
- Pain, itching or tingling in a localized area
- A rash with blisters, usually on one side of the body
- Pain that may continue after the rash heals
Transmission
- Shingles itself results from reactivation of virus already in the body
- Blister fluid or particles from the blisters can spread the virus to susceptible people, causing chickenpox rather than shingles
Prevention
Vaccination helps prevent shingles and its complications; eligibility depends on local recommendations and individual risk. If you have shingles, cover the rash, avoid scratching and wash hands. Until lesions crust over, avoid contact with susceptible pregnant people, vulnerable newborns and people with weakened immune systems.
Diagnosis and care
Contact a healthcare professional promptly if shingles is suspected. Antiviral treatment works best when started early.
Source
- About Shingles (Herpes Zoster)
Based on CDC information
Source language: English
Source reviewed: January 17, 2025
Source accessed: May 17, 2026
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