Prolonged bed rest, after surgery or unexplained swelling of one or both lower limbs – be alert to deep vein thrombosis of the lower limbs Patients with heart disease atrial fibrillation or ventricular wall tumor, etc., suddenly appeared limb cold, numbness, pain, pallor, ischemia, or suddenly appeared severe abdominal pain, nausea, vomiting, abdominal distension – it is likely to have an arterial embolism. -are likely to have developed an arterial embolism. People over 50 years old or with diabetes mellitus gradually develop shortened walking distance Cramps and pain in the calves after a short walk; cool, numbness, pain, pallor, ischemia of the limbs, and in severe cases, bruising and blackened necrosis of the limbs Weak or pulseless limb veins – most likely to have arteriosclerotic occlusion or diabetic atherosclerosis limb ischemia Young people, especially Young people, especially male smokers, develop phlebitis, weak or pulseless limbs, or coldness, numbness, pain, pallor, ischemia – vasculitis Young women with weak or pulseless limbs, dizziness, high blood pressure, cataracts – may have aortitis (pulselessness) Feeling of a throbbing mass on the abdomen, neck or limb – may be arteriosclerosis. A throbbing mass felt in the abdomen, neck or limb – may be an aneurysm or arteriovenous fistula Patients with cirrhosis who have abdominal wall varicose veins starting at the base of the thighs should be treated with the exception of Bugart’s Syndrome Patients who have had a mini-stroke should be examined for carotid artery stenosis Strong veins on one side and weak on the other side, may be diseased Varicose veins, some easy to see blood vessels, blood vessel clusters, etc., may be vasculitides Color ultrasound, Vascular anomalies detected by ultrasound, CT, or MRI should not be ignored.