Yesterday, a patient’s family called to say that her mother has been diabetic for nearly 10 years, and her preprandial blood sugar has been 9-10 recently, and the doctor said it was under control. However, a week ago, she found that her right big toe was a bit painful and the front part of her big toe nail showed signs of blackening and infection, and she went to the hospital to have an ultrasound showing blockage of blood vessels in her leg. For this patient, I am going to talk about two main issues: First, about blood sugar control. The blood sugar control of diabetes should not only have pre-meal blood sugar, but also include post-meal blood sugar changes. Because some patients do not have high blood sugar before meals, but not after meals, in this case the overall blood sugar control is still bad, or complications will occur. Many patients who are hospitalized in our hospital have this situation, feeling that everything will be fine if their blood sugar is not high before meals, so there will be no complications, but their bodies are getting worse day by day without thinking much about it, which often leads to various complications in the end. Second, on the toenail blackening. Patients have been checked for lower limb vascular occlusion, which is a typical complication of diabetes and one of the main causes of diabetic foot, which is also a more difficult category in terms of treatment. Because of long-term ischemia in the lower extremities, blood oxygen saturation decreases and tissues are vulnerable to damage. Patients with a blackened anterior segment of the big toe nail are likely to have had a bump and trip injury, just because the legs and feet don’t feel sensitive or don’t care, and will show signs of blackening and necrosis after a few days. So, how to do how to treat this situation? I mainly mention the following points: First, we must comprehensively assess the patient’s physical condition, not only the lower limb blood vessels, but also the heart, kidney and other aspects of the problem, whether anemia and lack of nutrition, blood sugar, blood pressure and blood lipids, etc.. Because, these are the things that may affect the development of gangrene. Second, develop a treatment plan to improve circulation. If the circulation in the lower extremity is not improved, the wound will heal slowly or even become infected instead of healing. But I personally do not recommend doing vascular interventions or putting in stents, because the long-term benefits are really too poor, you can use a combination of Chinese and Western medicine to treat peripheral vascular disease, the effect can be maintained for a long time. Third, for the treatment of blackened toenails. It is necessary to find a specialist to evaluate the wound situation in detail, and if necessary, it is necessary to clear the nail to clean the inflammatory tissue under the toenail together to provide the necessary conditions for the growth of fresh tissue. The treatment of diabetic wounds that do not heal is a combination of Chinese and Western medicine open treatment. After cleaning the wound, the main external application of Chinese ointment with the effect of decay and muscle growth, to create a wet environment for the wound, to improve the immunity and resistance of local cells, so as to achieve the purpose of rapid wound healing. If the local hospital cannot solve the problem, you can refer to our hospital. Finally, I wish you a speedy recovery.