Hi, I am a 20 year old male, and for the last 2 weeks have had a kind of rash around the skin on my legs around the genitals, and on the testicles. It is not so much a rash but after showers/exercise it gets very itchy and when I scratch it it gets a bit red. If I put talcum powder over it that calms it down almost immediately but it won't go away. I weight 75kg and am 175cm.