Clinical manifestations of venous occlusion can be divided into venous occlusion of the limbs, which is characterized by swelling of the limbs, decrease in skin temperature, movement disorders and so on; venous occlusion of the internal organs, such as common portal vein thrombosis, splenomegaly, pain in the liver area and so on. 1. Venous occlusion of limbs: Most of the venous occlusion is manifested as venous occlusion of limbs, mostly in the lower limbs, which is mainly manifested by swelling, pain, decrease in skin temperature, movement disorder, severe patients will not be able to walk, intermittent claudication, etc., and the symptoms will be aggravated when they stand or walk. 2. Venous blockage of organs: venous blockage can be manifested differently in different organs, such as mesenteric vein blockage can cause abdominal pain, abdominal distension and so on, such as portal vein blockage can cause splenomegaly, pain in the liver area and so on, and the prognosis is worse if it is not treated in time. If you have unexplained lower limb swelling, abdominal discomfort and other symptoms, you should consider the possibility of corresponding venous occlusion, you should go to the hospital in a timely manner to improve the examination, clear diagnosis, and then comply with the doctor’s instructions for treatment, to avoid delays in the condition.