The same virus that causes chicken pox causes herpes zoster or shingles. Once the virus is contracted, it remains in the nerve cells in what is called a resting phase. When there is a recurrent outbreak, the virus manifests itself as herpes zoster or shingles. You cannot get herpes zoster without having had chicken pox. The first outbreak will always be in the form of chicken pox and subsequent outbreaks will be in the form of shingles.