Hi, I am 52 years old and for the past few months I have been suffering from excessive itching. I’m on plavix, lipitor, synthroid, an aspirin due to heart stent and hypothyroidism. My rash appears like welts and then changes to more extreme itch. It started from the lower back and has spread all over the back, chest, and legs. Some dermatologists say it is hives while others say its eczema.