hello,i have itches around my groin area which has resulted to the skin around that area to be inflamed and scaly.there is also a white layer very close to my groin which feels kind of dusty and looks like dandruff.i am 27,male,i have been having this itch and feeling like 10yrs and counting.i have done my STI,STD tests and all came out negative.what can i do about it,because it feels very embarrassing.i am 6ft 2