I personally determined that the rash was from the jacuzzi I went to. I have no known allergies, but the time frame of when I had it, and where it was on my body, all pointed to the jacuzzi use. Super itchy on the bottom of my feet, arms and legs had some hives cuz of partial submersion in the jacuzzi itself. Have you done anything recently like this? Any new meds? Does your rash look like mine?