Diabetic rotten feet manifest in two main ways. One kind of diabetic foot has localized pain. The performance of this condition diabetic foot is mainly localized blackness, no swelling performance, because of the vascular problems of the diabetic foot, the blood vessels are not open, the toes do not get blood flow, there will be this dry necrosis, it looks like the foot is not swollen, purplish red or ischemic, this situation is the state of ischemia. This is when you need to pay attention to this situation, to go to the hospital to do relevant further examination. There is another kind of diabetic foot is very red and swollen locally, but there is no pain, why is there no pain in this case? The main reason is that diabetes affects the neuropathy, resulting in little sensation in the toes, redness and swelling, but the blood vessels are fine, the blood vessels can pour blood out, there will be no infected tissue, there is some secretion coming out, it will behave as swelling, some even have pus oozing out, there will be a bad smell. Many of these patients, because at the beginning there is a little redness and swelling, but did not feel, did not care, and then malodorous, smelled, before coming to seek medical attention, this situation to seek medical attention in a timely manner, to further surgical treatment in a timely manner, clean up the necrotic tissue, and then do further repair.