Jock itch is a common fungal infection that affects the skin in the groin area. It is caused by a type of fungus called tinea, which thrives in warm, moist environments. Symptoms include itching, redness, and a rash that may spread to the inner thighs and buttocks. This condition is more prevalent in individuals who sweat a lot or wear tight clothing. Treatment typically involves antifungal creams or powders, which help eliminate the fungus and relieve symptoms. Maintaining good hygiene and keeping the area dry can also help prevent jock itch.