What is the Shingles, also known as herpes zoster?

Shingles, also known as herpes zoster, is caused by the reactivation of the varicella zoster virus. After experiencing chickenpox or exposure to the varicella zoster virus, The virus stays dormant in the body for life. With age, the immune system naturally weakens, which may allow the usually inactive virus to reactivate, causing shingles.
Hence, older people have an increased chance of getting shingles. It typically produces a painful, blistering rash that appears on one side of the body or face