have you checked for goiters
they say it is because of lack of iodine
but you may have difficulty processing iodine
really though I'm not a doctor
but I would get my thyroid scanned to see what is going on
listen to yourself
i recently read an article that stated excema could be related
to allergens, which could be in your food
Also today i was listening to how
gmo foods can cause many reactions
If you can , buy organic produce especially kale and spinach