Vascular veins on the legs are obvious can be divided into physiological and pathologic. Physiological may be related to sedentary standing, obesity and so on. Pathologic may be related to varicose veins of the lower extremities. If physiological factors are excluded, it is recommended that the patient go to the hospital in time to clarify the cause of the disease. 1. Physiological factors: usually related to sedentary standing and obesity. Due to long time standing or sitting, the blood in the legs cannot circulate normally, resulting in obvious veins. Obese people usually lower limbs to withstand greater gravity, easy to lead to the lower limbs of the blood run blocked, there will be blood vessels on the leg veins very obvious situation. 2. Pathological factors: usually associated with varicose veins of the lower extremities. Mainly because of the congenital superficial vein wall weakness or valve closure insufficiency, as well as intraventricular pressure persistent elevation leads to venous dilatation, proximal venous valves occur atresia incomplete, so that the blood backflow, and gradually destroy the distal valve and the formation of varicose veins. This leads to a situation where the veins on the legs are very obvious. If we exclude physiological factors, we suggest that the patient go to the hospital in time, clarify the cause of the disease, and treat the cause.