Hi. This is a new phenomenon, and the mainstream medical guys are either too ignorant, or are scrammbling to deal with a million things coming at once to acknowledge this. Important to note, this may be contagious. If the scalp is itchy, take care not to fluff or scratch near food ect. It is in the blood and can be detected. You will have to search the net about ways to keep immunity healthy--it's mostly about the normal rules of health--excercise, diet, anti-oxidants, vitamins ect.
Hopefully this could be a normal run-of-the-mill scabbies infection and you can get treated for that. I recommend you see regular doctor and get it looked at.
Shroom