Good morning all.....to anyone having a rash and scalp itchiness I have Essential Thrombocytosis which causes the extreme itching. Mostly my scalp but periodically body and legs. I don't take a medication for it but I use a lotion called Taro-monetasone. It helps to tone down the itchiness. Hope this helps someone out there. I notice the itchiness mostly at night but this lotion has helped.