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 there is no hard knot at the original varicose vein, but there is still varicose vein, it indicates residual or recurrence, further treatment is needed; local hard knot should not be squeezed, natural fading is best; 3, there is pigmentation at the varicose vein after treatment, this phenomenon lasts for 1~3 months, wearing gradient pressure elastic stockings can quickly and obviously improve the pigmentation phenomenon. 4, Diosmin and other drugs are beneficial to improve the inflammatory reaction after foam sclerotherapy, such as redness, swelling, pain, local fever and other sensations; vitamin E essence can fade out the skin pigment by penetrating into the skin, so that the sclerotic plaque is 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, after foam sclerotherapy to Pay attention to appropriate walking, walking in the case of wearing elastic stockings can make the blood flow back to the heart via deep vein, especially after just doing the treatment more should walk, so as to prevent the formation of deep vein thrombosis, so we require walking for 30 minutes immediately after treatment; later walking in 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 the heart level. In the early stage after treatment, it is especially beneficial to reduce swelling. 6.In our medical practice, we have never seen any case 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 rotary treatment.