The medical name for vascular occlusive disease is atherosclerotic occlusive disease. It is a systemic atherosclerotic lesion that occurs in the large and medium arteries. It causes chronic ischemia of the lower extremities when the abdominal aorta and its distal main arteries are involved. The disease is more common in men, and the age of onset is mostly above 45 years. The cause of the disease is not fully understood, and high-risk factors include hypertension, hyperlipidemia, diabetes, smoking, obesity, and many other factors. In the early stage of arteriosclerotic occlusive disease, there are only symptoms of numbness and coldness in the diseased limb, lower skin temperature, paler color, and weakened dorsal foot artery pulsation. At this time, the diseased limb already has a limited arterial stenosis lesion. Intermittent claudication ensues, with soreness and pain in the lower leg after walking 100 or 200 meters. The patient often sits with the knee bent and the foot protected, or the limb drops to relieve the pain. It may be accompanied by dark redness of the finger belly and edema of the distal limb. At this point, the arterial stenosis is extensive and severe, and the tissue is on the verge of necrosis. Toward the end, the symptoms continue to worsen, with blackening, drying, necrosis, or hemorrhagic ulceration of the finger end. If secondary infection develops, systemic symptoms such as fever and irritability may occur. Early diagnosis and treatment of the disease can improve the consequences, and the examination is relatively simple, and can be diagnosed by ultrasound, so if you find the above symptoms should be consulted as soon as possible. Especially when combined with diabetes, hypertension and hyperlipidemia. (KFH)