Fungal infections are caused by various species of fungi that are present in the environment such as on plants, dirt, and household surfaces. Additionally, some fungi naturally reside on the skin and inside the body. Factors like a weakened immune system, excessive sweating, and prolonged use of antibiotics can increase the risk of developing a fungal infection. Furthermore, certain lifestyle habits such as wearing tight-fitting clothes and not drying skin folds properly after bathing can also make a person more prone to fungal infections.