Varicose veins of the lower extremities are dilated, bulging and tortuous vein walls caused by stagnation of blood and increased pressure in the veins of the lower extremities, and are often referred to as “vein bulges” in common parlance. The etiology is complex, including congenital factors, acquired structural damage factors, hemodynamic abnormalities and so on. 1. Congenital factors: congenital valvular weakness or incomplete closure, congenital superficial venous wall weakness, etc. can lead to the occurrence of this disease. 2. Acquired vascular structural factors: phlebitis, trauma and other factors, resulting in poor proximal venous reflux, or branch valve atresia, varicose veins can occur. 3. Abnormal hemodynamic factors: teachers, nurses and other long-term standing workers. As well as obese people, pregnant women and other venous blood reflux resistance increases, resulting in a persistent rise in venous pressure leading to venous dilatation, the disease will occur. When varicose veins of the lower limbs appear, it is recommended to go to the hospital in time.