<prompt>  A 56 years old man has painful rashes over his right upper eyelid and forehead for the last 48 hours. He underwent chemotherapy for Non-Hodgkins lymphoma one year ago. His temperature is 98 F, blood pressure 13876 mm Hg and pulse is 80 minute. Examination shows no other abnormalities. Which of the following is the most likely diagnosis -ImpetigoHerpes zosterPyoderma gangrenosumErysipelas 