Shingles is a reactivation of the same virus that causes chicken pox, varicella zoster. Most people who get shingles are over 60 years of age. The exact cause of the reactivation of the virus is not known. People who are under stress or have weakened immune systems seem to be especially vulnerable. The location of shingles on the body depends on the involved nerve.
Most cases appear around the waist or on the upper chest or back.
In some instances it may occur on the face or in the mouth. There is usually no direct danger from the virus. If it involves the face, care should be taken to prevent damage to the eyes. Your health care provider can help prevent complications. Many people get a slight fever and headache just before the rash appears.