I'm hoping you can help. My mom has been experiencing severe itchiness on her neck & face only. It gets very hot & dry & she can't find any relief. Dermatologists cannot seem to determine what's wrong & have drawn blood & found nothing. There is no rash, flaking...nothing. It comes & goes, sometimes stays for days at a time. She's tried steroids, creams, Benadryl...nothing's helping. Please, can you make any suggestions at all in terms of what tests she might have her doctor run? We would appreciate it tremendously.