Varicose veins are not thrombosis, there is an essential difference between them in terms of medical definition, clinical manifestation and treatment. 1. Medical definition: Varicose vein is a clinical disease, which refers to the bulging, expanding and tortuous veins due to the stagnation of blood in the veins and the weakness of the vein walls; thrombosis is a clinical symptom, which refers to the coagulation of blood or the agglomeration of some formed components of blood to form a solid mass in the heart and blood vessels of living bodies. 2. Clinical manifestations: varicose veins symptoms can be manifested by the feeling of soreness, discomfort and pain, and in serious cases, skin atrophy, flaking and other symptoms; while the symptoms of thrombus are mainly manifested by the blockage of blood vessels, embolism, causing heart valve deformation, extensive bleeding and so on. 3. Different treatments: varicose veins are often treated by ligation, stripping, sclerosis, ablation and other methods to deal with the diseased blood vessels themselves; thrombosis is treated by thrombolysis, thrombus removal and other methods to remove blood clots from the body, most of which will protect the integrity of the blood vessels and their physiological functions. Therefore, varicose veins are not thrombosis, and it is recommended to consult a doctor for clarification when the disease is suspected.