Some diabetic foot patients will do lower extremity arterial intervention, there are many spent tens of thousands of hundreds of thousands, not only did not cure the disease, the gangrenous area of rapid upward infection, at first may be a toe black gangrene, a day two on half a foot or even the whole leg gangrene. Our diabetic foot specialist reminds us that this is because the surgery has failed and the blood vessels are occluded again leading to aggravation. According to the conventional understanding, it is effective to do vascular stent to unblock the blood circulation when the blood vessel is blocked, and this is indeed the case clinically. However, if you understand the characteristics of diabetic foot vascular occlusion, you will know why it is more serious after surgery than without it. This is because diabetic lower extremity arterial occlusion, which is a diffuse occlusion and a staged occlusion, is much more serious than the common vascular occlusion. This means that, especially in patients with a combination of wound infection, surgery is actually no longer indicated. If done, most patients will develop re-occlusion, and the consequences may be even more severe than before. In some patients, there are also many post-operative problems, such as a patient in Hunan who insisted on having a local vascular intervention and had a sudden acute ischemia of the lower limb the night after the surgery, where the plaque came off to form a thrombus somewhere and the whole leg started to blister, darken and slowly become necrotic. Therefore, if a patient has a diabetic foot, especially if there is already a large area of gangrene and the patient is not in good health, overall we do not recommend surgery. If it has been done and ulcerated again, it is recommended to transfer to a diabetic foot specialist as soon as possible and receive conservative treatment with a combination of Chinese and Western medicine to avoid further deterioration.