Yes this may be herpes zoster viral infection. It is also known as shingles. It is characterized by a painful skin rash with blisters involving a localized area. It is caused by varicella zoster virus. Predisposing factors are old age, immune-compromised patients such as HIV infection, patients on chronic steroid and chemotherapy. Shingles resolves within 3–5 weeks, but secondary bacterial infection and chronic pain due to post – herpetic neuralgia may occur. Duration of recovery from post – herpetic neuralgia is uncertain and variable. Advice 1. Tablet valaciclovir 500 mg three times daily per oral if blisters are covering large area. No need of oral valaciclovir if blisters are localized to smaller area 2. Apply locally aciclovir 3% ointment five time daily 3. Tablet ibuprofen 600 mg thrice daily per oral for 5 days for pain relief 4. Tablet ranitidine 150 mg twice daily for 5 days to prevent acidity caused by stress and ibuprofen 5. Do not take mental stress as it aggravates shingles Thanks