rash on thighs and backitchy skin burning sensation no rashburning feeling on skin no rashburning sensation skin no rash rednessrash on stomach back and thighsburning sensation no rashburning rash on back of thighitchy rash on back of thighssensitive burning skin no rashbumpy rash on back of thighsrash on back of knees and thighsheat rash on back of thighs