Dermatophyte infections are fungal infections that affect the skin, hair, and nails. They are caused by a group of fungi known as dermatophytes, which thrive in warm and moist environments. Common types of these infections include ringworm, athlete's foot, and jock itch. Symptoms often include redness, itching, and flaking of the skin. These infections are typically spread through direct contact with an infected person or contaminated surfaces, such as towels or gym equipment. Treatment usually involves antifungal medications, which can be applied topically or taken orally, depending on the severity of the infection.