about a month ago,i started havin these white patches around my groin n scrottom..i was on holiday in a cold weathered country.anyway,i thought it was a winter rash bt it became really itchy and when i moisterised it it dissapeared..after a while when i came back it was itchy so i scratched it..soon it became kinda dark,like burn scars.n whn i scratch it it gets all white and flaky..then when i put moisteriser on it its still kinda itchy..bt if rub this dirt like substance rolls of it...but the skin is still kinda dark..is this just a prolonged winter rash or some type of fungus?