The sequelae of lower extremity venous thrombosis include deep venous insufficiency, lower extremity walking obstacle, pulmonary thrombosis and so on. 1. Deep venous insufficiency: If the treatment is not complete or delayed, the venous thrombosis will gradually transform from acute to chronic disease, causing deep venous insufficiency, and the superficial veins will be in a state of high pressure. This will lead to edema, dermatitis, ulcers and other phenomena in the feet. 2. Lower limb walking disorder: This condition is most common in DVT patients. As the disease progresses, the lower limbs may show pain and swelling, which may affect the function of the lower limbs and lead to claudication. 3. Pulmonary thrombosis: When a deep vein thrombus is dislodged, it may enter the lungs with the blood and block the blood vessel. This condition will hinder oxygen exchange, induce chest pain, hemoptysis, dyspnea and other symptoms, which can be life-threatening in severe cases. There are many after-effects of venous thrombosis that can be a nuisance to your health and life. Therefore, after the treatment of venous thrombosis, you should not take it lightly, and should closely monitor your body’s development, strengthen personal care and regular review.