A soybean-sized lump in the testicle is considered to be related to folliculitis, varicocele, and testicular tumor. 1. Folliculitis: folliculitis is related to bacterial and other pathogenic infections, while trauma to the testicular skin and wearing tight clothing are triggering factors. The disease will cause the patient’s testicles surface grow a soybean-sized pimples or pustules, but also easily accompanied by pain, itching and other uncomfortable symptoms. 2. Varicocele: the cause is still unclear, may be related to venous valve insufficiency, venous return obstacles. Most patients are asymptomatic, but in severe cases, the scrotum on the affected side will increase in size, accompanied by a feeling of swelling and pain. The tortuous veins and sinuses on the surface of the scrotum may look like growths. 3. Testicular tumor: the disease can cause some patients to grow a soybean-sized testicles, but also easily accompanied by testicular heaviness, lower abdominal swelling and discomfort and other symptoms. The cause of testicular tumor is not clear, may be related to cryptorchidism, heredity, infection and so on. In addition, because ordinary people can not distinguish the difference between testicles and epididymis, so there is also a possibility that it is not a lump on the testicles, but more common epididymal head cysts and epididymal caudal inflammatory nodules, tuberculosis, etc., need to do ultrasound and other tests to clarify.