I have had this rash for 3 months now. They are random and scattered, one on the shaft of me penis, randomly scattered over my scrotum all of different sizes, and finally the rash follows from my scrotum through to my anus and on the inside of my bum cheeks. I have treated with anti fungal creams, yeast infection creams and tablets. Natural remedies, Coconut oil, tea tree oil and moisturizers. If anything it has spread and now also seems the rash has spread to the front hairline of my scalp. The Rash is a bright red color with defined edges slightly raised, when dry there are fine scales with a dandruff like appearance. It is sore to the touch and if left untreated is very itchy. I don't have psoriasis anywhere on my body, and no history of it in my family. I have been treating athletes foot. I am a very clean person with good personal hygiene. My sexual partner has no symptoms of any sort on her body. I have changed job recently where i spend a great deal of time sat down, that is the only change in my life. Any ideas what this may be, thank you.