Uncontrolled diabetes can damage your nerves. If you have damaged nerves in your legs and feet, you might not feel heat, cold, or pain.
This lack of feeling is called “sensory diabetic neuropathy.” If you do not feel a cut or sore on your foot because of neuropathy, the cut could get worse and become infected. The muscles of the foot may not function properly because the nerves that make the muscles work are damaged.
This could cause the foot to not align properly and create too much pressure in one area of the foot. It is estimated that up to 10% of people will develop foot ulcers. Foot ulcers occur because of nerve damage and peripheral vascular disease.