Many diabetic patients will suddenly find ulcers on the feet, diabetic patients occur such a problem is actually a warning, as follows: 1, warning of poor long-term control of blood sugar, long-term high sugar will damage the nerves, blood vessels, resulting in diabetic foot, that is, ulcers; 2, lower limb vascular problems, especially the foot blood supply, there is not enough blood supply, small skin breaks or trauma can not be timely healing; 3, warning of a Severe diabetic neuropathy, long-term hyperglycemia will make peripheral neuropathy, the sensation of pain, temperature, pressure will be abnormal, generally diabetics do not feel pain, normal people feel hot when diabetics feel warm, easy to happen foot burns and they do not know at all, abnormal pressure sensation, even if the pressure of a small stone in the shoe, the skin are worn out, blisters, diabetics do not know Even if a small stone is pressed into the shoe and the skin is worn out and blistered, the diabetic will not take off the shoe and dispose of the stone before continuing to walk like a normal person. All conditions represent complications caused by poor long-term control of diabetes, and if these conditions are present, it is important to seek prompt medical attention. Small ulcers can cost a patient a toe or even a leg if they are not seen and treated promptly.