Lower extremity atherosclerosis-occlusive disease is a common and frequent disease occurring in middle-aged and elderly people. It is the manifestation of systemic atherosclerotic lesions in the lower extremities, and is a degenerative change of the large and medium-sized arteries of the human body; it is manifested by thickening and hardening of the diseased arteries, accompanied by atheromatous plaques and calcification, and can be followed by thrombosis, resulting in narrowing or occlusion of the arterial lumen, which eventually leads to insufficient blood supply to the lower extremities, resulting in a series of clinical symptoms, and in serious cases, easily endangering the health and life of the limbs. In the early stage of the disease, patients may have no obvious symptoms or mild symptoms, which are often ignored. Patients only feel cold and numbness in the lower limbs, especially in the feet, or are easily fatigued after activities, or have tinea pedis infections that should not be controlled. If the disease is not taken seriously at this time, it may develop further and manifest itself as “intermittent claudication”, which means that after walking for a period of time, the calf muscles become spastic, weak or painful, and the patient must stop walking and rest for a while, and the symptoms are relieved before continuing the activity, and then the symptoms recur after walking a similar distance, or in some cases, the patient shows No significant pain or discomfort when walking slowly, but symptoms of lower extremity pain occur when walking faster. These are due to the narrowing or occlusion of the arteries in the lower extremities, causing insufficient blood supply to the lower extremities, which can still ensure blood flow to the extremities at rest, but with the movement of the extremities, the local blood and oxygen demand increases, but the blood flow cannot increase, thus causing pain due to limb ischemia. Therefore, the pain can be relieved rapidly after stopping the activity, and the symptoms recur after moving again. If sufficient collateral circulation is established at this time, the ischemic symptoms will be relieved and some patients will stay at this stage; however, if the collateral vessels are poorly established and the disease continues to develop, it will enter the “resting pain phase”. At this time, the affected limb is in a rather severe ischemic state, and even at rest, the pain and numbness and abnormal sensation are felt, and the pain is usually mainly at the extremity. If the disease continues to develop, it will soon enter the stage of tissue necrosis, that is, necrosis or ulceration of the toe, the skin at the end of the toe becomes purple or black, the skin is broken, and if accompanied by infection, local redness, swelling, exudation and odor, the disease progresses rapidly and can develop rapidly upward to the foot, ankle and calf, and even the symptoms of systemic poisoning appear, at this time, not only the risk of amputation (toe) is very high, and can be life-threatening. Therefore, early detection and early treatment of the disease is particularly important, in the early stages of the disease, timely intervention, to deal with the risk factors of the disease, to develop good habits, to take the right prevention and control measures, can effectively slow down the rate of progress of the disease, to curb the further progress of the disease. 1, early detection: early symptoms of the disease are mild and should not be detected, in addition to some of the above symptoms, there are some physical signs can help determine, such as reduced skin temperature of the affected limb, compared to the two sides of the limb, or the end of the limb and proximal, the skin temperature of the lesion site is lower; limb end skin color will also change, early pale skin color, as the disease progresses, the skin color from pale can turn into dark red, and then can become purple-black The pulsation of the peripheral arteries of the limb may be diminished in the early stages and may disappear in the later stages. The blood pressure of the upper and lower extremities can also be measured to get a general idea of the degree of limb ischemia. In addition to physical examination, to more accurately determine the extent, scope and location of vascular lesions, instrumental examinations are required. Ultrasound is a non-invasive test, while angiography is the “gold standard” for the diagnosis of lower extremity atherosclerosis and occlusive disease, which can accurately show the location, degree, collateral circulation and hemodynamic changes of the narrowed or occluded vessels, but it is an invasive test. Arterial CT is a minimally invasive test, which is more commonly used because it is less invasive and its accuracy rate is closest to that of angiography. 2, early prevention: the risk factors of atherosclerosis are hypertension, hyperlipidemia, smoking, diabetes, obesity, family history, etc. The first four are especially important for patients with lower extremity atherosclerosis. Some studies show that patients with lower extremity atherosclerosis occlusive disease suffer from diabetes, compared with the non-diabetic population, the prevalence is higher, the age of the disease is small, and the disease progresses quickly. Smoking is extremely harmful to peripheral blood vessels, twice as harmful as cardiovascular and cerebrovascular. Some surveys also show that the majority of patients with lower extremity atherosclerosis occlusive disease smoke, and quitting smoking can improve clinical symptoms and slow down the progression of the disease. Therefore, it is very important for patients with atherosclerosis to control blood pressure, blood lipids and blood sugar and to quit smoking strictly. In addition, regular walking exercise can also make many patients’ symptoms relieved. The method of exercise is for patients to insist on walking until the symptoms appear and then stop, rest for a moment until the symptoms disappear and then walk for exercise, and so on repeatedly, insisting on 1 hour a day. 3, early treatment: early disease can be conservative treatment, such as the use of some anticoagulant, vasodilator drugs, can slow down the progress of the disease, improve the symptoms, but can not fundamentally eliminate the narrowing of the blood vessels, occlusion. As the disease progresses to the stage of resting pain, tissue necrosis, or serious intermittent claudication with requirements for quality of life, surgical treatment can be used, including arterial endothelial stripping, vascular bypass reconstruction, artificial vessel replacement, etc. However, the risks and complications of surgery are relatively high and traumatic, plus the patients are generally older and often combined with hypertension, diabetes, cardiovascular and cerebrovascular diseases, etc. Other serious medical diseases increase the risk of surgery. In recent years, the development of endovascular intervention has brought great progress in the treatment of lower extremity atherosclerosis occlusive disease. With the advantages of minimally invasive, relatively simple operation, precise efficacy and repeatable operation, endovascular intervention has become the main means of surgical treatment for this disease. At present, percutaneous balloon dilatation and angioplasty for lower extremity atherosclerosis is a relatively mature technique. The main mechanism is that the balloon mechanically dilates the narrowed or occluded blood vessels to remodel them for therapeutic purposes. Problems that can lead to vascular entrapment and elastic retraction after balloon dilation can be compensated by stenting. In addition, TCM has its unique advantages and efficacy in all stages of the disease. Through internal administration of TCM, external fumigation, and sedation of TCM preparations, it can relieve symptoms, delay disease progression, promote the establishment of collateral circulation, improve the long-term patency rate after surgery, and reduce disease recurrence. For patients with ulcers, depending on the condition of the sore surface, different methods of dressing changes such as decaying and clearing, sweating, patching, and dragging lines are helpful to promote sore healing.