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, yeast infections, jock itch, ringworm and some skin rashes are the result of certain types of fungi that can build up on the skin and mucus membranes to cause fungal infections. A fungal infection of the skin can create a great deal of discomfort, appearing as a red, intensely itchy, inflamed rash.ome types of fungus can also live and grow on body tissues, such as the fingernails or skin, leading to an infection. Infections caused by fungus include yeast infections and ringworm infections (such as jock itch or athlete's foot). Fungus usually grows best in moist, dark areas, such as folds of skin.