How Can I Avoid The Itching And Burning Sensation For

How can i avoid the itching and burning sensation for shingles. Already been to the doctor and urgent care several times. Urgent care did no know I had shingles....got so bad I went to ER. i was prescribed Actclovar (anti-viral) and a pain medication (Gobatantin?) something like that. However, I am still experiencing a burning sensation and itching-particularly in my scalp. The rash on my face have dried up but now my scalp has been itching and burning. Thank YOu.