Herpes zoster is a relatively common disease caused by Varicella-Zoster virus and characterized by a vesicular dermatomal rash and a variety of neurologic manifestations. These neurologic symptoms include herpes zoster neuralgia, myelitis, encephalitis, cranial arteritis, segmental and rarely polyradiculitis. This report is a case of a 57-year-old female with herpes zoster paresis affecting the arm and hand. Herpetic pain was much relieved after continuous cervical epidural blockade. However, fifty days after onset of ailment, she complained motor paralysis. EMG of muscles innervated by the left $C_8$ and $T_1$ roots revealed high frequency denervation potentials and large amplitude polyphasic motor units. We recommended physiotherapy and aggressive exercise therapy of the hand. After eighty days of therapy, denervated spontaneous activities disappeared on EMG. Clinically, strength of muscles had nearly recovered to 75% of normal strength in left hand intrinsics.