Varicose veins with rotting holes in the ankles is a serious complication of venous insufficiency of the lower extremities caused by varicose veins followed by complication of ankle ulcers that lead to gangrene of the skin. Varicose vein ulcers are caused by impaired venous return, or venous reflux resulting in elevated venous pressure, leading to skin trophic disorders, which can be induced by minor trauma to the ulcers. Varicose ulcers should be treated with wound care, disinfection using iodophor, hydrogen peroxide, etc., and can also be covered with dressings to promote wound healing. Surgery can also be used to eliminate venous reflux and reflux obstruction, relieve venous hypertension, improve vascular circulation function, and promote ulcer healing. In order to prevent varicose veins, it is necessary to avoid sitting and standing for a long time, wear compression stockings and strengthen the lower limb movement.