I have had skin crawling but not just on my head and face. It was all over my skin. Its very distressing. Sorry I havent heard of the skin loss either. Have you any lesions or sores? If so check out Morgellons Disease. Otherwise it could be some skin parasite - I believe there is a skin parasite forum on curezone or even the candida toxins can cause these sensations. I swore I had insects crawling over me but turned out that it was the little tiny nerves under my skin giving rise to insect type crawling sensations. I have a Chronic-Fatigue-Syndrome diagnosis too and there are neurological disturbances going on with Chronic-Fatigue-Syndrome which again can cause these crawling, tingling or biting sensations. Hope you can get to the bottom of whats causing the problem.