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.
When to Call the Doctor. Complications after a toe amputation are rare but not unheard of. Upon returning home, call your doctor if you notice any symptoms of infection such as chills or fever, urination problems or pain, or suffer from a cough, chest pain, shortness of breath, vomiting or nausea.