Hello dear Understand your concern Herpes infection is caused by herpes simplex virus. It also spread by direct contact to lesion of infected person through minor cut or injury. It also affects the leg and arm produce fluid filled blister an associated with fever, headache and enlargement of lymph node Diagnosis by blood test detect the antibodies and antigen against HSV-1 and HSV-2. Advice: Tablet ibuprufen Topical benzocaine/lidocaine to reduce pain severity Antiviral drug: oral/topical valcyclovir Avoid sex till you get better Use safer sex practice: condoms and oral diaphragm Hope this may help you Best regards Dr. Sagar