The patient was a male, 18 years old, with left testicular pain. Interventional radiology was performed to identify the cause of the symptoms and to treat them at the same time, with the following findings. Interventional radiological findings Basic features: varicocele of the left spermatic vein, vascular interventional injection of sclerosing agent (sodium tetradecyl sulfate) combined with coil embolization, multiple segmental coil nests and scattered sclerosing agents were seen. Differential diagnosis: 1. varicocele; 2. testicular reticular dilation; 3. testicular torsion; 4. epididymitis Diagnosis: left spermatic varicocele treated with sodium tetradecanesulfate and coil technique. Varicocele of the testis is characterized by tortuous dilatation of the veins and formation of trabecular plexus. The main cause is related to the absence or insufficiency of valves of the spermatic veins. The disease affects about 10-15% of the population, and 30%-40% of these patients suffer from infertility. There are many different opinions about the cause of the disease, but the main ones are: 1) the absence or insufficiency of the spermatic vein valve; 2) the compression of the left renal vein travel area and the obstruction of reflux, i.e. Nutcracker syndrome. Varicocele is unilateral in 95% of cases, mostly on the left side. The age of onset is mainly between 15-25 years. About one-third of men with varicocele have infertility, which is characterized by reduced sperm motility and abnormal sperm cell shape. It is important to note that there is no correlation between the degree of varicocele and the incidence of infertility. The diagnosis of varicocele is made clinically by a solid mass in the scrotum that looks like a “bag of worms” and is confirmed by ultrasound. Color Doppler is highly sensitive for the diagnosis of varicocele and can be performed in supine and upright positions with Valsalva maneuvers. Primary varicoceles are usually less symptomatic in the supine position and more symptomatic in the upright position and Valsalva maneuver. Varicocele may also be a sign of other conditions. The spermatic veins on the left side of the scrotum are connected to the veins of the kidneys, so kidney disease may cause blood to flow back into the scrotum. Liver cirrhosis and liver cancer can cause venous obstruction in the lower abdominal cavity and varicose veins in the right spermatic cord. Tumors in the lower abdominal cavity may also cause compression of the blood vessels, resulting in varicose veins. For the treatment of varicocele, venous interventional angiography and embolization is a method, the indications of which include testicular pain, edema, infertility, recurrence of varicocele after surgery, and lack of effect of conservative treatment for three months. The most commonly used embolization method is a metal coil combined with a sclerosing agent, namely sodium tetradecyl sulfate. This method has a success rate of nearly 100% for varicocele and a 30%-35% chance of successful fertility in patients with infertility symptoms.