What Is Shingles?
Shingles is a painful viral infection caused by the reactivation of the chickenpox virus (varicella-zoster) later in life. It typically presents as a painful rash, often on one side of the body, and can lead to complications such as long-lasting nerve pain (postherpetic neuralgia).
Shingles occurs when the varicella-zoster virus, which remains dormant in nerve tissue after a previous chickenpox infection, becomes active again. The virus affects nerve endings, causing pain and a characteristic blistering rash.
Shingles can occur at any age, but the risk increases as people get older, particularly over the age of 50 or in individuals with weakened immune systems.