Varicose veins are a common condition. The main methods of treatment for varicose veins are: sclerotherapy, surgery and endovenous radiofrequency or laser treatment. Sclerotherapy is safe and reliable due to its simplicity, and has the characteristics of patient trauma, less pain and good clinical treatment effect. Sclerotherapy is the injection of drugs into the lumen of the diseased vessel, using its chemical inflammatory and other reactions to occlude the lumen and produce tissue fibrosis for the purpose of treating the disease. The treatment of varicose veins with sodium cod liver oil acid or polyglactin injection can achieve good therapeutic results.