I have been using the vit. c and salt therapy for lyme, and the itching in the scalp has dramatically diminished. The die-off is rather unpleasant, but it has rewards. You must keep it up. I take up to a tablespoon of salt at a time. [3 times a day] you can lower the dose--mine is high.
It seem to have an effect on the microfilarial-type "things" which grow in the scalp. Shroom