We've had posts on this before. One member tried a protocol of mixing heartburn medicine and allergy medicine. I seem to notice less hives when I take two Zantac daily plus my daily Zyrtec. In fact, my hives are very much improved since I added Zantac to my routine.
Also, when my face is red and burning, I use petroleum jelly to soothe. I also use Mary Kay products, like their creamy cleanser. I switched from Avon products, which were too harsh.
For my scalp, I use prescription Nizoral. That does the trick.
My swelling is much improved since my medication was bumped. How is she being treated for her disease? The weight should be manageable if she is on the correct level of thyroid hormone.
Post her TSH, FT3, FT4 and current dosage of medication.