Superficial varicose veins of the lower extremities are a common upright disease and a clinical manifestation of chronic venous insufficiency of the lower extremities. It is most likely to appear in special groups who are engaged in standing work for a long time, such as traffic police, teachers, surgeons, mall salesmen and pregnant women. Long-term standing, sitting or weight-bearing can increase the pressure of the thrombus in the veins of lower extremities, causing the veins to dilate and the valves to lose their one-way opening effect, which eventually leads to superficial varicose veins. The status of sclerotherapy in the treatment of varicose veins in the lower extremities has been up and down, and it is also the main means of treating varicose veins in the lower extremities in many places that claim “no hospitalization and no surgery”, but its limitations and numerous complications have limited the clinical promotion, with the progress of medicine, the international advanced therapy of Doppler ultrasound guided foam sclerotherapy has emerged. With the advances in medicine, Doppler ultrasound-guided foam sclerotherapy has emerged as an endovascular treatment technique that in many cases achieves the same results as traditional surgical high ligation, while also reducing numerous complications due to the dramatic reduction in the dose used, ending the era when lower extremity vein patients could only be treated in the later stages of medicine. At the 2005 annual meeting of the Royal Society of Medicine Venous Forum in Edinburgh, participants consistently agreed that in the treatment of varicose veins, in order to give the best possible treatment to patients, doctors are advised to use foam sclerotherapy. In March 2011 our hospital was the first in the province to carry out this latest technique, in which medicine is diluted and mixed with gas to produce a fine foamy liquid that is injected into the varicose veins under direct vision or ultrasound guidance, and the swollen vessels gradually subside, leaving little or no scarring after treatment. The traditional liquid sclerosing agent is diluted by blood flow after entering the blood vessel, and the effect on the vessel wall is significantly weakened, while the foam type sclerosing agent can push the blood away without being diluted, and works directly on the vessel wall, while reducing the dosage of drugs and promoting venous contraction to reduce edema, which is more beneficial to aesthetics.