What Causes Itching On Thigh And Butt?

last week i had itching feeling on my thai area after coming from shower n wore my night cloths, i ignored that time thought it is just a temporary allergy. but now its a week that i have itching on thais and even on my butts. Today i notice my wrist has some itching rashes too. In the night it get increased ..i have taken AF150 and Levo cetizine , and even applied Lobate GM and Clocip on recommendation of my chemist friend. Are these medicines r ok...