The body normally hosts a variety of microorganisms, including bacteria and fungi. Some of these are useful to the body. Others may multiply rapidly and form infections. Fungi can live on the dead tissues of the hair, nails, and outer skin layers. Fungal infections include mold-like fungi that cause: Fungal infections also include yeast-like fungi such as candida. Candida yeast infections include: Fungal nail infections are most often seen in adults. They often follow fungal infection of the feet. Fungal nail infections may be difficult to treat and may recur often. Toenails are affected more often than fingernails. People who frequent public swimming pools, gyms, or shower rooms -- and people who perspire a great deal -- commonly have mold-like infections, because the fungi that cause them thrive in warm, moist areas. The risk of getting a fungal infection is increased by closed-in footwear, prolonged moist skin, and minor skin or nail injuries. | 
General Dermatology
