1.People who are prone to varicose veins of lower limbs. People who are engaged in standing or sitting work for a long time, such as teachers, salesmen, soil guards, surgeons, etc. Because the veins are subjected to high hydrostatic pressure for a long time, varicose veins of the lower limbs are likely to occur. 2, has appeared varicose veins of lower limbs but do not want to operate. Some patients refuse the surgery because the varicose veins are mild or afraid, then, wearing elastic stockings can effectively protect the veins and avoid further aggravation of varicose. 3.Patients after varicose vein stripping surgery of lower limbs. Wearing elastic stockings after surgery can promote venous reflux, wound healing and prevent recurrence. 4.The latter of deep vein thrombosis of the lower limbs. Patients with lower extremity deep vein thrombosis, although treated, often the veins cannot be completely recanalized and the venous blood return is impaired, and heavier lower extremity swelling and heaviness will occur. Wearing elastic stockings can improve the symptoms and at the same time can effectively prevent the recurrence of thrombosis. 5.High-risk group of lower limb deep vein thrombosis. After major surgery, especially after orthopedic surgery of lower limbs; pregnant women; patients with dysfunctional coagulation mechanism; bedridden patients with prolonged illness; long-term users of contraceptive pills; patients with malignant tumors, etc. These people are very prone to lower limb deep vein thrombosis due to slow blood flow and high coagulation. The elastic stocking not only has a therapeutic effect, but also has a health care effect. Because of its role in promoting venous reflux, people who are engaged in long-term standing work can significantly reduce the swelling of the lower limbs and reduce fatigue after wearing them, and will be relaxed after taking off the elastic stockings at night, instead of dragging a pair of heavy legs.