Herpes zoster: A primary care approach to diagnosis and treatment.

Herpes zoster, or shingles, caused by a reactivation of the chickenpox virus, can occur in patients of any age, but is more common in older adults. Patient history is critical in reaching a diagnosis, not only to manage the outbreak effectively, but also to prevent severe complications such as dissemination of the virus into the central nervous system. This article describes recent changes in diagnostic testing, treatment, prevention, and practice guidelines as well as the approach clinicians should take when evaluating patients with herpes zoster and assessing risk for complications.