Venous embolism often occurs in both lower extremities, and may also occur in the iliac veins, organ vessels and so on. Venous embolism thrombus dislodged may also cause pulmonary embolism, the patient will have chest tightness, chest pain and other symptoms, according to the occurrence of different parts, the symptoms are also different, the current common clinical symptoms and treatment of venous embolism mainly include the following aspects: a. Symptoms 1, limb venous embolism: common is the lower limb deep vein thromboembolism, can occur in one lower limb, can also occur in bilateral lower limbs, some patients can be no symptoms The patients may have blue silk, red silk, such as earthworm and spider web, or local skin. Most patients will show local swelling and pain of the onset limb, and some patients will have symptoms such as redness and swelling of the local limb skin, and these symptoms will be aggravated when standing upright and walking, and these symptoms will be improved when resting, elevating the limb or lying in bed; 2. Pulmonary embolism: deep vein thrombus of the lower limb will be dislodged and flow to the pulmonary artery with the blood, which will cause pulmonary embolism, and patients will have symptoms such as chest tightness, shortness of breath, chest pain, and Coughing blood and other symptoms, and in serious cases, patients will also have syncope, shock, and even life-threatening and other serious situations. Therefore, patients with lower extremity venous thrombosis embolism, once the symptoms of chest tightness and chest pain occur, consider the occurrence of pulmonary embolism, should immediately seek medical attention and emergency treatment; 3, organ vascular vein embolism: clinically common is mesenteric vein thrombosis, portal vein thrombosis, patients will appear abdominal pain, abdominal distension, stop exhaustion, defecation, and serious can also lead to intestinal necrosis. Second, the treatment of venous embolism can be anticoagulated with low molecular heparin subcutaneous injection or large molecular heparin intravenous drip during hospitalization. After discharge from hospital, oral anticoagulant drugs such as warfarin and rivaroxaban should be taken, and coagulation function and vascular ultrasound should be reviewed regularly. Deep vein thrombosis of lower limbs usually takes oral anticoagulant drugs for 6-12 months, 80% of deep vein thrombosis can disappear, avoid massage or hot compressing local limbs to avoid dislodging thrombus. If the venous embolism occurs in the iliac vein, swelling and pain of the whole lower limb will occur, and interventional or surgical thrombosis treatment can be performed according to medical advice. Patients with pulmonary embolism need surgical thrombectomy, percutaneous catheter intervention, and oral administration of new anticoagulant drugs as prescribed by the doctor, and the prognosis is generally good. In case of mesenteric vein thrombosis, in addition to thrombolytic therapy, surgical treatment to remove the diseased intestinal canal will be given if necessary.