A fungus that is normally found in the body but commonly becomes overgrown in people with diabetes. Overgrowth is due to increased sugar in the body and a weakened immune system. Use of antibiotics or birth control pills also increases the risk of candida overgrowth. Candida overgrowth can lead to infection, causing itching, skin lesions, or rash. Some common areas of infection are in or around the mouth, armpits, groin, vagina, and nails.