What causes varicose veins in the lower extremities? Why are they so prevalent in the teaching population? What are the usual preventive measures? Varicose veins in the lower extremities is a common disease in vascular surgery, and its incidence can be as high as 25% in the adult population, usually manifesting as superficial veins in the lower legs that are tortuous and bulging into clusters, and the patient feels swollen and itchy in the lower legs, and in severe cases, there will be pigmentation, eczema and ulceration in the boot area of the lower legs, commonly known as “old rotten feet” and “tongluo sores”. “gong sore”. This disease mostly occurs in tall, long time engaged in upright position workers, in addition, and family genetic also have a relationship. Teachers, because of their own work, need to work in an upright position for a long time. When a person is in an upright position, the gravity of the blood column of the whole body acts on the femoral veins of the lower limbs, which, over time, leads to the expansion of the veins of the lower limbs, and the valves of the femoral veins themselves, which are resistant to backflow of blood, will slowly produce incomplete closure or contracture of the valves and produce leakage, which leads to backflow of blood, which increases the resistance to the return flow of blood from the distal veins and increases the pressure in the veins, resulting in varicose veins, swelling of the ankles and feet, skin pigmentation and even skin ulceration in the limbs. The skin pigmentation and even skin ulceration. Because of these reasons, many teachers who have been engaged in classroom teaching for a long time have varicose veins in their lower extremities to different degrees, and some teachers feel uncomfortable in the afternoon when their calves are swollen and heavy, and they always want to put their limbs up high to feel more comfortable. So, what are the means to prevent and treat varicose veins in the lower limbs? Usually pay attention to elevate the affected limb, avoiding the long time of weight-bearing limb sagging; for the patients with varicose veins, it is not advisable to sit still or stand still for a long time, because teachers often need to work for a long time, so remind the teachers to move their limbs at the right time to promote the blood circulation of the limbs; for the patients with mild varicose veins symptoms, they can wear a special sock –In addition, some vasoactive drugs can be taken appropriately according to the doctor’s prescription; for those who have serious symptoms, especially those who have local eczema, pigmentation or ulcer in the foot and boot area, surgery is the only effective means to solve the pain, and the surgery is best to go to Specialized vascular surgery, the doctor will make a reasonable deep vein valve function repair plan according to the patient’s lower extremity venography results, so as to achieve the best treatment effect. Dear teachers, please pay attention to your legs!