Itching sometimes along with some shapes seems to be urticaria
.You have not mentioned duration ,since there are 2 types of urticaria .If its more than 6 wks its called chronic urticaria and if it is less than 6 wks then it is acute urticaria.N number of causes for urticaria,but most common are diet ,any drugs ,worm infestation,any source of infection in body like urine,dental,fungal etc.At present you take tab.allegra
180 mg for 2 wks along with tb.rantac
150 mg early in morning. Avoid added food preservatives,avoid pain killer drugs (if you take it) .After 2 wks still your problem persists then you have to undergo a detailed blood and urine examination.But we hope your problem will solve in 2 wks,best of luck...........