Jock itch, also known as tinea cruris, is a common fungal infection that affects the groin and inner thigh areas. It often appears as a red, itchy rash with a raised edge and may cause discomfort, itching, and even burning sensations. This condition is caused by a type of fungus that thrives in warm, moist environments, making the groin area an ideal breeding ground. You can prevent and treat Jock Itch by following these simple steps: Keep it dry: After a shower, make sure the area is completely