Varicocele third degree is defined as a varicose vein that is like an earthworm mass, which is obvious on visualization and palpation. Varicocele is caused by abnormal elongation, tortuosity and dilatation of the venous plexus in the spermatic cord. Primary varicocele is more common, with more left-sided onset, and is most common in young adults, and may cause infertility. It can be categorized into three degrees based on ultrasonography, where the third degree refers to varicose veins like earthworm masses, which are more obvious on visualization and palpation. Varicose veins with mild lesions are mostly asymptomatic. In severe cases, they may manifest as enlargement of the affected scrotum, with a sensation of swelling and vague pain, and the symptoms may worsen when walking or standing for a long time. For those who are asymptomatic or have mild symptoms, they can be treated with scrotal banding only and followed up regularly; when the symptoms are severe and lead to infertility, they should be treated with surgery as prescribed by the doctor. When the varicocele is third degree, you need to go to the regular hospital in time, and under the guidance of the doctor active treatment, and strive for early recovery.