Scrotal ultrasound is mainly to check and understand whether there are scrotal related diseases, including the following items:1. Testicular epididymis, scrotal ultrasound can understand whether the volume of testicular epididymis is normal, whether there is testicular atrophy or whether there is testicular inflammation, epididymitis and lead to changes in the volume of the epididymis, such as increasing.2. Check whether there is sheath effusion, scrotal ultrasound, if there is a sheath effusion, then you can see no echo dark fluid area under the ultrasound. If there is a syringomyelia, you can see a dark fluid area without echoes under the ultrasound. The larger the amount of syringomyelia, the deeper the depth of the echo-free fluid area under the ultrasound. 3, check the spermatic cord for the presence of varicose veins, spermatic cord torsion, etc. 4, check the scrotal wall without edema, such as the presence of hypo-proteinemic scrotal edema, the ultrasound can be measured by the thickness of the scrotal wall, and the presence of cellulitis in the scrotum, you can also observe the thickness of the scrotal skin, etc.. Also can further check whether there is subcutaneous effusion, subcutaneous abscess, etc. 5, can also check whether there is a hernia, part of the hernia can be protruding and fall into the scrotum, scrotal ultrasound can be found in the hernia organization.