ABSTRACT
Varicella is a primary infection caused by varicella-zoster virus (VZV). It is very contagious and self-limited. It is characterized by a centripetal eruption of vesicles with an erythematous base. The lesions evolve into umbilicated pustules and crusts that can leave small pits. Herpes zoster (shingles) is caused by reactivation of the varicella-zoster virus. It is manifested by hyperesthesia and pain with groups of vesicles over an erythematous base. It is self-limited and in adults and elderly can cause postherpetic neuralgia.
