Recently, the diabetic septuagenarian due to shoe gravel abrasion right toe skin, triggering infection ulcers, resulting in purple toes, broken, right leg extremity cold, numbness, dull sensation, came to Nanjing Hospital of Traditional Chinese Medicine for consultation, through the lower limb vascular intervention and a combination of Chinese and Western medicine internal medicine treatment, fine balloon, preserving the feet of the elderly. Experts reminded that hot weather, the opportunity to increase the bare feet, the chances of injury also rose, diabetic patients in a long-term hyperglycemic state, skin breaks are often prone to ulcers, and cause infection ulcers are not easy to heal, and at the same time, due to lower limb arteriosclerosis, occlusion, causing insufficient distal blood supply, easy to form foot necrosis, therefore, early detection and early treatment of diabetic foot must be given sufficient attention. A 74-year-old man with diabetes for nearly 20 years, usually has good blood sugar control and good health, and maintains a good habit of walking every day. Two weeks ago, a small gravel fell out of his shoes when he washed his feet at night, and when he took a closer look, he found that his right toe had worn a small layer of skin, but at that time the old man did not care. A few days later, the second and third toes gradually became purplish red, the wound broke down and became infected, feeling numbness and pain in the lower limbs, walking distance is getting shorter and shorter, and the pain increased at night when sleeping, which panicked and sent to Nanjing Hospital for treatment, the hospital endocrinology Wu Xuesu, chief physician, introduced the patient is a typical diabetic foot, commonly known as “old rotten feet “The most common consequence is chronic ulceration, which can lead to amputation or even life-threatening when serious. In terms of treatment, patients are mostly required to control blood sugar through medical treatment, and then perform lower limb artery balloon dilation surgery, together with Chinese medicine to activate blood circulation and remove blood stasis, so as to restore blood flow to the arteries and avoid the consequences of amputation. Diabetes and its complications seriously affect people’s health, and diabetic lower limb ischemia is one of the serious complications caused by diabetes. In the past, diabetic lower limb ischemia or gangrene was thought to be caused by the sclerosis of small arteries on the distal side of the limb, and diabetic wounds were prone to infection and did not heal easily, so they could only be treated conservatively and allowed to develop until amputation. Now, with the advancement of medical technology, the arterial blood flow reconstruction of the lower limbs can be achieved through endovascular interventional techniques, especially the balloon dilation technique of the infrapopliteal vascular lesions, so that a large proportion of diabetic patients with severe ischemia of the lower limbs can not only avoid amputation but also retain their functions. Before the surgery, the magnetic resonance angiography showed that the arteries of the lower limbs were stenosed and occluded in many places bilaterally, and the blood flow was as intermittent as insect bites, but after the surgery, the angiography showed that the occlusion of the short segment of the severely stenosed lower knee artery basically disappeared, and the blood flow returned to normal, and the clinical symptoms improved significantly, the blood circulation improved significantly, and the pain and numbness disappeared. Diabetic patients are prone to vasculopathy, and the repair ability of local tissues is reduced, making it difficult for wounds to heal. Arterial stenosis and occlusion of the lower limbs will lead to insufficient blood supply, intermittent claudication, resting pain, and foot ulceration and necrosis in severe cases, so it is recommended that diabetic patients should pay attention to foot trauma and timely treatment to avoid serious consequences caused by diabetic foot. In summer, diabetic patients should take care of their feet while controlling blood sugar, avoid walking barefoot in the cold, whether at home or outdoors, to prevent foreign body damage; develop a good habit of checking the skin of the feet for redness, cracks, blisters, crush injuries, ringworm, scratches and toe deformation; pay attention to washing feet with warm water and soft soap, test the water temperature with hands instead of feet, and gently dry them with a cotton towel after washing. Pay special attention to keep the feet and toes dry; at the same time elevate the lower limbs to promote venous reflux, avoid prolonged leg stretches, and rub the leg belly more in summer to unblock the blood vessels to increase the strength of the leg muscles. Once there is numbness in the lower limbs, pain when walking, resting pain at night and skin breakdown and other early symptoms should be promptly sought medical attention.