Back and leg pain is relatively common, and there are many causes of back and leg pain. The important thing is that low back and leg pain is again most easily ignored. Many people in the leg pain, will think that exertion exercise or weather changes rheumatic pain and other reasons, rest rest or take some antipyretic and analgesic drugs will be good, rather than go to the hospital to check the clear cause, so that the condition aggravates, miss the best treatment time. One of the major causes of leg pain is blockage of arteries in the lower limbs. This cause is not understood by many people. In clinical practice, we often see many patients who have been treated for lumbar disc herniation, but only after they come to our department do they realize that it is arterial blockage. Of course, there are also some people who have both diseases and are only treated for lumbar disc herniation, not knowing that there is also arterial disease. What are the diseases that cause arterial blockage? The main ones are: lower extremity atherosclerosis-occlusive disease, thrombo-occlusive vasculitis, diabetic foot, arterial thrombosis, etc. Some people may not know that the blood vessels of the legs can also be atherosclerotic. In fact, atherosclerosis is the aging of the human body, with the age of blood vessels will gradually aging, and atherosclerosis is systemic, blockage of the site if it occurs in the cerebral vessels called cerebral infarction, if it occurs in the cardiovascular called myocardial infarction, if it occurs in the lower limbs called lower limb atherosclerosis occlusive disease. And diabetic patients are more likely to have this aging. Therefore, the middle-aged and elderly, especially diabetic patients once the leg pain must not be ignored, to seek timely medical attention. What kind of leg pain is artery blockage? The typical symptom of this disease is intermittent claudication: that is, pain and weakness in the legs and feet after walking, relieved after rest, and the symptoms reappear after continuing to walk. This is because due to the lower extremity artery occlusion, walking muscle oxygen consumption increases and causes ischemic pain in the lower extremity, after resting blood is partially replenished so that ischemia relief agent, continue walking muscle oxygen consumption increases again, leg and foot pain reappears. At the same time, lower limb ischemia can also cause cold feet, toe skin color pale or cyanosis and other symptoms. As the arterial occlusion will become more and more serious over time, eventually the blood vessel will become solid and can no longer pass, resulting in foot necrosis and eventually only amputation. Therefore, treatment must be done before it is too late.