Diabetic Foot Ulcer: Causes and Treatments Diabetes, if not managed properly, can cause many health issues. One serious complication is a diabetic foot ulcer. When blood sugar stays high for a long time, it damages blood vessels and nerves. This damage, called neuropathy, reduces the ability to feel pain or injuries in the feet. Because of this, even small cuts or blisters can go unn... https://www.freedomfromdiabetes.org/blog/post/diabetic-foot-ulcer/3982