Jock itch. Nearly everybody gets a jock itch rash at some point in life. Owing to genitalia, boys and adult men are more affected by jock itch rash than women. Jock itch in men occurs due to prolonged wetness in the groin area and friction with clothes or skin. Similarly, female jock itch occurs due to excessive sweating; and sometimes the jock rash appears even beneath the breasts.