Re: Iodine Update..

"I used to get a energy rush and zero scalp inflammation when taking only one drop of Iodine."
then;
"The itchy scalp doesn't present itself on the surface. It looks completely normal, it's more of an internal thing."

This seems to be two different things; the latter more candida related (or parasites) the first more adrenal / inflammation/ low zinc and Iodine related.

Borax / Iodine have helped tremendously in scalp problems, even if it dosnt show on the surface. Itching in particular. I use it in my shampoo; I was a big time candida sufferer with the most itchy scalp.
Lugols Iodine with a touch of vit C is also a wonderful skin remedy in general; please try just to know what a great stuff you have available. Without the vit C it can be used to "burn" off a mole. etc etc

When it comes to excema that comes and goes; beware that Aspartame and other artificial sweeteners can cause this. (Doesnt have to be your case, but I answer for others as well)
My 11 year old son get an excema in his armpit if he drink as little as one glass of diet soda. Last time only a few weeks back. "I would not be impolite and say no , mummy" (so many kids birthdays etc with serving of only diet pop) After a week of two of itching he asked for help; and some iodine diluted in water + zinc salve on top took care of it within a day or two.