Hello doc. i have develop few purplish to dark red itchy rashes on my scrotum. these becomes severe itchy when i work out or on sweating. i get good results on washing with hydrogen peroxide. but they donot go away completely. i am 32.

May be fungal/yeast: infection on the skin of the scrotum. The groin area is a common place that fungal infections occur. The fungus tends to grow well on areas that are warm and moist, and often itch worse when the area become more warm and moist (eg. when working out and/or sweating). Try using an OTC treatment for jock itch, if not helpful, may need prescription. Consider in-box consult on HealthTap for Rx.