Men with gradually enlarged testicles should check the scrotal ultrasound to identify the specific causes of testicular enlargement. 1, the more common factors are acute orchitis, but in this case the patient will also be accompanied by localized pain and fever, and need to be timely anti-inflammatory, symptomatic treatment to alleviate the progress of the disease. 2, it may be the testicular sheath effusion, is also a relatively common condition, the examination of the scrotal ultrasound can find obvious fluid dark area, sometimes requiring surgical treatment. 3, it may also be varicocele, which is more common in young men, touching the testicles can be found within the tortuous, swirling, sometimes needing surgical treatment. It can be found obvious liquid dark area, sometimes need surgical treatment. 3, may also have varicocele, more common in young men, touch the testicles can be found in the scrotum has a tortuous, coiled, worm-like appearance of the venous mass. In this case, routine semen examination is needed, and if the semen is abnormal, high ligation of posterior tibial varicose vein is needed.4. It is also possible that men have testicular cancer, and it is recommended to check the local CT to make sure whether there is a risk of testicular cancer, and at the same time, pathological puncture biopsy is needed to make clear the situation of testicular cancer, and once the diagnosis is confirmed, surgery should be carried out in a timely manner.