Dystrophic changes in the skin of the lower extremities is one of the symptoms of primary lower extremity deep venous valve closure insufficiency, which occurs mostly in people who are persistently engaged in physical labor or standing workers, and has a higher incidence in farmers, hairdressers, athletes, surgeons and other people. Common diseases include simple varicose veins of the lower extremities. The examination methods are as follows. The routine method of examination of varicose veins in the lower extremities is generally by checking the function of the patient’s venous valves and the degree of venous blood flow. Normal valve function, unobstructed venous blood flow, and abnormalities in the vein wall are all clinical tests that physicians often need to diagnose varicose veins in the lower extremities. In varicose veins, the veins of the lower extremities are obviously tortuous and dilated, more pronounced when standing. Deep vein patency and saphenous valve insufficiency are also diagnostic criteria for varicose veins, and patients with varicose veins may have venous valve insufficiency in the transportation branch. Ultrasound Doppler or venography shows tortuous dilatation of the saphenous vein with valve insufficiency. Patients with varicose veins may have complications such as hyperpigmentation, ulceration, superficial thrombophlebitis, bleeding, and ulceration.