What are superficial varicose veins and phlebitis of the lower extremities?

       Superficial varicose veins of the lower extremities are the most common of peripheral vascular diseases, with a prevalence of about 20-40% in the total population, 10 times higher than that of arterial disease. It mostly occurs in the saphenous vein on the inner side of the limb and the small saphenous vein on the back side of the calf, with the saphenous vein being the most common.  In the early stage, there is no obvious discomfort, but with the development of the disease, the superficial veins under the skin can be seen to be flexed and elevated in the form of cords, and the patient can feel tired, heavy, sore, unable to rest, tightness or swelling, itching and dry skin of the lower limbs.  When standing for too long, swelling of the calves and ankles may occur, and sometimes painful calf muscle spasms may occur. Superficial varicose veins of the lower extremities are easily combined with phlebitis, which manifests as redness, pain, swelling of the ankles and calves in the area of the superficial veins running along the inner side of the lower extremities. In later stages, darkening of skin pigmentation and chronic venous stasis ulcers of the lower leg are seen, which do not heal easily over time.  The diagnosis of this type of disease is not difficult, but the key is to exclude secondary varicose veins of the lower extremities caused by deep venous lesions such as inferior vena cava, iliac vein and femoral vein, which can be identified by color Doppler ultrasonography or lower extremity venography.  The treatment of superficial varicose veins in the lower extremities still takes surgery as the first choice. Early stage patients can be treated with elastic stockings and Chinese herbal medicine to improve symptoms and slow down disease progression. Most hospitals still adopt the standardized high ligation of saphenous vein with segmental stripping.  Our department adopts a minimally invasive surgery based on this procedure, with an inguinal skin incision ≤2.0cm and a punctiform incision on the inner calf, which results in fast recovery and aesthetic appearance, and ensures the quality and effect of the surgery. For the recurrent attacks of varicose veins in the lower extremities combined with phlebitis, we use Chinese herbal medicine for internal administration, fumigation and external application with good results.  Other minimally invasive treatment techniques for this disease, such as sclerotherapy, transillumination rotary technique, laser occlusion, radiofrequency occlusion, are only carried out in some hospitals, and their side effects and postoperative recurrence rate are subject to further clinical verification.