scab. 1  An incrustation over a sore, wound, vesicle, or pustule, formed during healing. 2  The mange, especially when it appears on sheep. 3  Any of several different diseases of potatoes producing pits and other damage on their surface, caused by streptomyces bacteria (but formerly believed to be caused by a fungus).
Diabetes complications from fungus infections in the toenails and fingernails can lead to amputations of the entire limbs. To understand how serious fungal toenails can be to a diabetic, you must first understand how diabetes affects the body.
Athlete's Foot. Athlete's foot, also called tinea pedis, is a fungal infection of the foot. It causes peeling, redness, itching, burning, and sometimes blisters and sores.Athlete's foot is a very common infection.The fungus grows best in a warm, moist environment such as shoes, socks, swimming pools, locker rooms, and the floors of public showers. It usually occurs between the two smallest toes. 2  This form of athlete's foot can cause itching, burning, and scaling and the infection can spread to the sole of the foot. 3  Moccasin: A moccasin-type infection of athlete's foot can begin with a minor irritation, dryness, itching, or scaly skin.