The document describes the venous drainage system of the lower extremity, including the long saphenous vein (LSV), short saphenous vein (SSV), deep veins, and perforating veins. It provides details on the anatomy and course of the LSV and SSV. Surgical procedures for varicose veins are discussed such as ligation and stripping, ligation of incompetent perforators, and newer minimally invasive techniques like foam sclerotherapy, endovenous laser ablation, and radiofrequency ablation. Post-operative care and potential complications are also summarized.