Many people, especially elderly people, have symptoms of cold and weak legs and feet, which are often mistakenly ignored because of the elderly’s poor regulation of cold, or even misdiagnosed as lumbar disc herniation, gout, calcium deficiency and so on. In fact, many patients with cold legs and feet and weakness are caused by lower limb ischemia. Doctors remind that cold legs and feet to prevent lower limb ischemia, if necessary, do some tests. The sudden onset of cold and pain in the lower limbs must be highly alert to the possibility of acute arterial embolism or occlusion. If misdiagnosed and treatment is missed, the limb will be too long due to ischemia leading to necrosis, requiring amputation. Ischemia can also lead to cold and weak legs Patient Cai Lao-Be’s legs are often cold and he is often woken up at night. Especially in winter, his legs were as cold as hammers and he could not sleep. Moreover, he feels weak after walking a short distance and needs to rest to get relief. For these legs, Cai Lao-Be saw many hospitals, there are said to be lumbar disc herniation, gout, calcium deficiency, etc., but the treatment is not effective. Recently, during a physical examination, he detected that his lower limbs were ischemic. After further examination, the doctor found that the long segment of superficial femoral arteries in both legs were occluded and needed to be “unblocked” through interventional surgery. After the surgery, Cai Lao-Be obviously felt his legs warmed up and no longer cold. “According to medical experts, the difficulty of walking with cold legs and feet is most likely to be attributed to lumbar spine osteophytes. In fact, a significant portion of them are caused by blocked arteries in the lower extremities. This type of disease is medically known as lower extremity atherosclerosis occlusive disease, lower extremity arteries because of narrowing or occlusion resulting in limb ischemia, is a manifestation of systemic atherosclerotic disease in the lower extremities. Its incidence is about 4% to 10% in people older than 40 years old, and can be as high as 15% to 20% in people over 70 years old. These diseases are characterized by a decrease in the skin temperature of the foot, coldness or mild numbness, easy fatigue after activity, painful spasms and fatigue in the muscles of the affected calf after walking a certain distance, and the need to stop walking for a moment to rest and continue walking only after the discomfort is relieved, and the symptoms recur after walking a certain distance. In more severe cases, the pain in the lower limbs at rest and even skin ulcers may occur. Some patients with sudden onset of cold and pain in the lower extremities and swollen and purple legs may be suffering from acute arterial embolism or occlusion, and should be promptly seen by a hospital specialist. How to prevent lower limb ischemic diseases, doctors said, first of all, we should actively treat hypertension, hyperlipidemia, diabetes and other underlying diseases, try to quit smoking, obese people should control their weight, develop good habits, appropriate exercise, avoid overeating, etc.