What is shingles?

Shingles (herpes zoster) results from a reactivation of the virus that also causes chickenpox. With shingles the first thing you may notice is a tingling sensation or pain on one side of your body or face. Painful skin blisters then erupt on only one side of your face or body along the distribution of nerves on the skin. Typically this occurs along your chest, abdomen, back or face, but it may also affect your neck, limbs or lower back. The area can be very painful, itchy and tender. After one to two weeks, the blisters heal and form scabs, although the pain often continues.

The deep pain that follows after the infection has run its course is known as postherpetic neuralgia. It can continue for months or even years, especially in older people. The incidence of shingles and of postherpetic neuralgia rises with increasing age. More than 50% of cases occur in people over 60. Shingles usually occurs only once, although it has been known to recur in some people.