<s>[INST] Hello doctor, Having severe pain in rightside back lower body with rashes. I will attach photos. [/INST] Hi. You have got herpes zoster (attachment removed to protect patient identity). It is caused by Varicella zoster virus. Very painful blisters will be there. Must be started on antivirals at earliest. Tablet Acyclovir 800 mg 5 times a day or other equivalent. For pain Paracetamol, apply Calamine lotion to the spots. If not available OTC please meet your doctor. Take care. Do not break the blisters. </s>