I used to get hives and terrible itching too, before I was diagnosed with Hashimoto's. That was mostly in the hyper stage of my disease, and I believe it was the excess hormone reacting in my body causing the itchiness. I still get it ocassionally but no where near as bad as before. I get patches of it and usually when under stress. I have had my thyroid removed and I know that it sure made a difference in the severity of the itching.
What you need to do is start an elimination process and go through all your cosmetics, shampoos, etc and remove one for a while and take note if the itching stays or not. I found whilst having my thyroid and the Hashimoto's, perfumed laundry powders made it worse.
You might need to get your anti-bodies checked too, to see if you have Hashi's
Hi im not a expert my no means but a have hashimotos i think thats how you spell it lol, when it flares and i have to raise mt dose of thyriod med I do get alot of itching brcause of the dry skin, maybe you should have it checked again, I didnt know thyroid disease ever stopped I thought once dx hyper or hypo its forever?
thanks barbara