I ve had , and still do,a scalp issue as follows;patches of dry crusty scab like spots that itch and my hair has thinned about 30%(in the last year).I ve used all kinds of shampoos etc.,to no avail.A dermatologist thought it might be staph,without a lab test, and my g.p. doc thought maybe that scratching may have caused the problem,again, no lab work.I am 68 years young, with a healthy vanity. My diet is not fab, but not awfull either. I do have fibromyalgia,but genetically,both parents,myself,and children have always had thick hair. None have the scalp issues I have. HELP!