Trichophyton rubrum is a type of fungus that commonly causes skin infections, particularly athlete's foot and ringworm. It thrives in warm, moist environments and can be found on surfaces like gym floors and swimming pools. This fungus primarily affects the skin, hair, and nails, leading to symptoms such as itching, redness, and scaling. Infections caused by Trichophyton rubrum are often treated with antifungal medications, which can be topical or oral, depending on the severity. Good hygiene practices, such as keeping the skin dry and clean, can help prevent its spread.