Shingles is a viral infection that causes a painful rash. Although shingles can occur anywhere on your body, it most often appears as a single stripe of blisters that wraps around either the left or the right side of your torso. Shingles is caused by the varicella-zoster virus. It is the same virus that causes chickenpox. After you have had chickenpox, the virus lies inactive in nerve tissue near your spinal cord and brain. Years later, the virus may reactivate as shingles.
While it isn’t a life-threatening condition, shingles can be very painful. Vaccines can help reduce the risk of shingles, while early treatment can help shorten a shingles infection and lessen the chance of complications.
Shingles may also be referred to as herpes zoster. This type of viral infection is characterized by a red skin rash that can cause pain and burning. Shingles usually appears as a stripe of blisters on one side of the body, typically on the torso, neck, or face. Most cases of shingles clear up within two to three weeks. Shingles rarely occurs more than once in the same person.
Most adults live with varicella-zoster virus in their bodies and never get shingles. But, for about one in three adults, the virus will become active again. Instead of causing another case of chickenpox, it produces shingles. It is still a mystery what makes the virus go from inactive to active.