Vitamin D deficiency is common in Hashis. It can cause
rashes, muscle cramps, etc. Get a 1,000 mg vitamin D pill
and take daily. Get one that is gluten/soy free. Walmart has them. Also, sitting in the sunshine 30 minutes a day helped me.
Sometimes, it's not so easy to control the rashes, hives, etc.
Also, I sure hope you're on thyroid meds. Eventually, as your meds are raised, you should be feeling better and maybe these rashes will clear.