Yes. Got some steroid stuff to put on scalp from gp as scalp cracked open. I have to use very mild shampoos now and conditioners. T/gel I have to use. £7 a bottle but it does work. Just dyed hair for first time in seven months and fine. I always do the 48hr test. No problems now since changes of other chemicals.

My hair is falling out too. I take a hair, skin, and nails. I also use Keranique hair products. It works to a point. I have used it for 2 years my hair still falls out but not as bad as before. I was afraid to use the 2% minoxdil that come with the kit. I started it using it two weeks ago I can't tell if the hair is still falling out. I let you know. It doesn't hurt my head.

That's why I can't perm or colour my hair. Hurts and itches like crazy.
Maybe they changed something in the formula of your regular dye. Maybe you'll have to look for more natural products.

Yes. I am developing allergies to just about everything including conditioner. Lost a great deal of my hair as well. I stopped coloring/styling/ etc. My skin is so sensitive, even to certain fabrics now. I have similar symptoms to your diagnosis. I suffer from extreme cold, burning hands, feet, arms and legs.
How is your scalp now?

I have had this too. Not everytime like you but randomly. The itching and burning and discomfort until it's washed out.