May be fungal balanitis you may require topical antifungal cream and tablets...consult dermatologist for clinical examination they will do the needful...with that Stay dry. Keep your groin area dry. Dry your genital area and inner thighs thoroughly with a clean towel after showering or exercising. Use powder around your groin area to prevent excess moisture. Wear clean clothes. Change your underwear at least once a day or more often if you sweat a lot. Wash workout clothes after each use. Be cool. Don't wear thick clothing for long periods of time in warm, humid weather.