Jock Itch, clinically known as tinea cruris, is a common fungal infection affecting the groin area, inner thighs, and buttocks. It is caused by dermatophytes, similar to athlete's foot, and thrives in warm, moist environments. Symptoms include an itchy, red, often ring-shaped rash with raised borders, which can be irritating and uncomfortable. The infection is contagious and can spread through skin-to-skin contact or sharing contaminated items.