shingles is a skin rash caused by the same virus that causes chickenpox. this virus is called the varicella zoster virus (vzv) and belongs to the herpes family of viruses. after an individual has chickenpox this virus lives dormant in the nervous system and is never fully cleared from the body. under certain circumstances such as emotional stress immune deficiency (from aids or chemotherapy) or with cancer the virus reactivates and causes shingles. in most cases of shingles however a cause for the reactivation of the virus is never found. anyone who has ever had chickenpox is at risk for the development of shingles although it occurs most commonly in people over the age of 60. it has been estimated that up to 1 000 000 cases of shingles occur each year in the u. s. the herpes virus that causes shingles and chickenpox is not the same as the herpes viruses that causes genital herpes (which can be sexually transmitted) or herpes mouth sores. shingles is medically termed herpes zoster.
what is shingles and what causes it?