I've Been Diagnosed With Hyperthyroid And Prescribed 10 Mg Of

I've been diagnosed with hyperthyroid and prescribed 10 mg of tapazole twice a day. I've been taking the medication for about a month now with no incidents but for the past two days I've been really itchy and not in the same area of the body. Sometimes it looks like hives. I also have skin writing disease. Is it possible that I've developed an allergy to tapazole and I should discontinue it for now.