I had hair fall out on the back of my neck also. It just started growing back in good about a month ago. As far as the waking up thing to spit get used to it for awhile. It was with me until about 3 weeks after rad ended. It started easing up then and one day I noticed it was gone but the dsaliva hasnt returned to what it used to be as of yet and probably wont but Im hoping it will get better.

Billy