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.
For people with diabetes, however, these common foot problems can possibly lead to infection and serious complications, such as amputation. 1  Athlete's foot 2  . Fungal infection of nails. 3  Calluses. Corns. 4  Blisters. Bunions.  Dry 1  skin. Foot 2  ulcers. Hammertoes.  Ingrown 1  toenails. Plantar  warts .