Thanks to a member on other post [Glaxony] I have ascertained by microscopic evidence, the presents of "skin mites" Everybody has them, but not everybody tolerates them. They mess up your immune-system and carry bacteria and who nows what else.
This explains my incessant scalp itch which I was sure was yeast. These things act up more in winter because of dryness.
They mostly go after certain blood-types and HLA types.
Those who know their blood-types please post it.