I have a rash that is (in large blotches) covering my upper back, part of my shoulders, my chest, and my neck. I think it may be moving up to my face. I know it isn’t hives because it isn’t raised or round. It itches like crazy and feels really warm.

I have not recently changed shampoo, conditioner, or body wash.

It’s driving me insane! Any idea on what it is?

Thanks.
It showed up late last night, went away for a few hours after I took a shower, and is back again.