A mass in the left testicle that looks like intestines is abnormal and is often caused by varicocele or inguinal hernia. 1. Varicocele: abnormal elongation, dilatation and tortuosity of the veins in the testicular spermatic cord in the shape of earthworms or intestines, which is more common in primary cases, commonly seen in young adults and adults, with more frequent onset on the left side. Mild symptoms are usually not manifested. When the symptoms are aggravated, the scrotum of the varicose blood vessels may be distended, with a feeling of swelling or pain, often appearing when the exertion leads to an increase in intra-abdominal pressure, such as when holding breath and doing physical activities. 2. Inguinal hernia: the contents of the abdominal cavity protrude through the deep ring of the inguinal canal, through the inguinal canal out of the shallow ring of the inguinal canal, and can enter the scrotum. The performance of the inguinal area protruding mass, can be protruded into the scrotum, in the scrotum found earthworm-shaped or intestinal mass. It often appears when coughing, walking or standing, and can be retracted with the hand when lying down or resting. If you notice symptoms, you should go to the hospital as soon as possible. When discomfort occurs, you need to actively seek medical attention to clarify the cause of the disease and then carry out targeted treatment.