I also have a bit of itching, but not nearly as bad as it used to be. But,
it seems that it has gotten worse since I started killing parasites
(and probably yeast along with it).
Previously I treated itching and dandruff with an antifungal shampoo from the pharamacy, and to my surprise it actually worked.
Tea tree oil might work also, though it might sting really bad. Maybe you want
to soothe the itch instead, possibly with a sink shampoo?