Foam sclerotherapy uses its foam to enter varicose veins and push the blood out of them, so that the drug comes into direct contact with the vessel wall, and by blocking blood flow, generating inflammation, and damaging endothelial cells, it causes thrombus formation in the blood vessels, and after 2 weeks, it mechanizes and forms striated fibers, thus achieving complete occlusion of the blood vessels, and flattening the varicose veins through gradient pressure elastic stockings to cure the varicose veins and make the affected limbs The treatment of varicose veins can be cured by gradient pressure elastic stockings, and the affected limbs can become beautiful. Therefore, the following phenomena occurring some time after foam sclerotherapy are inevitable in the treatment process: 1. local redness, which usually disappears within 1 week; 2. local hardness and tenderness, which lasts about 1 to 3 months and gradually subsides due to the presence of thrombosis and the therapeutic effect of the striated fibers. This hard node exists under the skin and does not affect the appearance of the limb, and the tenderness is tolerable and does not hurt without touching and does not affect the self-care and general work at all. If the original varicose vein without hard knot exists, there is still varicose vein, which indicates residual or recurrence, further treatment is needed; local hard knot should not be squeezed, natural fading is the best; 3, there is pigmentation at varicose vein after treatment, this phenomenon lasts 1~3 months, using vitamin E serum rubbing and wearing gradient pressure elastic stockings can quickly and obviously improve the pigmentation phenomenon. 4, Diosmin, Mai Zhi Ling and other drugs are beneficial to improve the inflammatory reaction after foam sclerotherapy, such as redness, swelling, pain, local heat and other sensations; vitamin E essence can fade out the skin pigmentation by penetrating into the skin, so that the sclerotic plaque can be gradually softened; gradient pressure elastic stockings can make the shape of the affected limb become beautiful, improve the pathological hemodynamic condition of the affected limb and cure varicose veins fundamentally; 5, foam sclerotherapy After treatment, we should pay attention to appropriate walking, walking with elastic stockings on can make blood flow back to the heart via deep vein, especially after just after treatment, which can prevent deep vein thrombosis, so we require walking for 30 minutes immediately after treatment; later walking with elastic stockings is beneficial to reduce swelling, hard knots and pigmentation, and promote ulcer healing if there is ulcer in the foot and boot area; bed rest makes the affected limb higher than This is especially good for swelling reduction in the early stage after treatment. 6.In our medical practice, we have never seen cases of deep vein thrombosis of lower limbs caused by new sclerotherapy; for varicose veins that are thicker and wider in scope, especially those with varicose veins in the thighs, foam sclerotherapy should be combined with laser treatment, otherwise there is a possibility of pulmonary embolism. Therefore, foam sclerotherapy should be carried out in a hospital with a lot of experience in foam sclerotherapy, so as to effectively avoid its dangers.