Varicose veins in the lower extremities commonly expose the veins on the back of the thighs, calves and feet, which look like curved earthworms. Main symptoms: Soreness, sinking, swelling, fatigue and weakness after standing for a long time. Damaged vein walls, bulging, dilated and tortuous veins with earthworm-like appearance, obvious in the saphenous vein travel area on the inner side of the calf, more obvious when standing. Swelling: Slight edema may appear in the ankle and dorsum of the foot, and in severe cases, mild edema may also be present in the lower calf. Consequences and complications: If left untreated, the following complications can occur: Nutritional changes in the skin: skin thinning, flaking, itching, hyperpigmentation, eczema-like dermatitis and ulcer formation. Thrombotic superficial phlebitis: pain at the varicose veins, showing red, hard nodules and striae with pressure pain. Ulcer formation: often occurs in the upper part of the inner ankle, and the lower third of the inner calf, with thinning of the surrounding tissue, hyperpigmentation, or eczema-like changes, which are more difficult to heal. Bleeding: Acute bleeding due to trauma or varicose veins, or spontaneous rupture of small veins. Stasis subcutaneous sclerosis: In the subcutaneous tissue, stasis sclerosis is formed. Treatment: Our hospital adopts “minimally invasive intracavitary laser coagulation (EVLT)” treatment, supplemented by sclerotherapy, to avoid the patient’s fear of traditional surgery, significantly shorten the hospital stay, minimize the patient’s normal work and life, and incision It also minimizes the incision and reshapes the patient’s desire for an aesthetically pleasing lower extremity.