1.What kind of disease is venous thrombosis? A: Venous thrombosis is a condition in which blood clots in the veins and cannot flow normally, causing various damages due to venous reflux disorder. 2.What is deep vein thrombosis A: Venous thrombosis can occur in deep veins, such as femoral vein and N vein in lower limbs, iliac vein and inferior vena cava in abdomen, jugular vein in neck, axillary vein and brachial vein in upper limbs and so on. This type of thrombosis is called deep vein thrombosis. Deep vein thrombosis is very dangerous and needs urgent treatment. 3.What is superficial vein thrombosis? A: Venous thrombosis can also occur in superficial veins, such as saphenous vein and varicose branch veins of lower limbs, superficial veins of upper limbs, superficial veins of chest wall and abdominal wall, etc. Superficial vein thrombosis is less harmful than deep vein thrombosis, and the two treatments are different. 4.What are the manifestations of deep vein thrombosis? A: The main manifestations of deep vein thrombosis in the lower and upper extremities are swelling of the limbs, pain in the limbs, increased skin temperature and dilated veins. The main manifestations of visceral vein thrombosis are abdominal pain, abdominal distension, diarrhea, blood in stool, hematuria and so on. Critically ill patients may develop symptoms of organ necrosis or life-threatening cardiopulmonary symptoms (pulmonary embolism). Lower extremity deep vein thrombosis pulmonary embolism thrombosis diagram 5.What are the manifestations of superficial vein thrombosis? A: The main manifestation of superficial vein thrombosis is that hard streaks, nodules or lumps appear in superficial areas (under the skin), and they are red, swollen and painful. For example, local redness and swelling of superficial veins after IV drip in the upper limbs, etc.