The appearance of penile and scrotal edema will be swollen, or one side of the scrotum is bigger than the other side, inconvenient, easy to be injured, sometimes combined with the feeling of swelling and pain, and even affect the blood circulation of the testicles due to the accumulation of too much water, which will cause the testicles to atrophy in time, affecting the ability of the testicles to produce sperm in the future, resulting in infertility. Penile and scrotal edema examination: Physical examination: in a dark place, shine a flashlight on the enlarged scrotum, if it is clear and will transmit light, it means it is the scrotal fluid accumulation, if it is not translucent, it may be a hernia or a testicular tumor, which needs further diagnosis. Penile ultrasonography: Penile ultrasonography (alias: penile ultrasound,penile color ultrasound), using high-resolution real-time gray-scale ultrasound and color Doppler flow imaging (CDI) technology, can be used for the examination of a variety of penile diseases. Currently, CDI has become an important test for the diagnosis and differential diagnosis of vascular impotence. It is most helpful in diagnosing and identifying whether it is a tumor or edema. Scrotal examination: Examination of the scrotum, which can be performed by a specialist, consists mainly of scrotal visualization and the raphe reflex. Self-examinations can also be performed to help in the early detection of certain conditions. The testicular reflex is one of the superficial reflexes in the human nerve reflexes. During the physical examination, a blunt-tipped bamboo stick is used to gently scratch the skin above the medial side of the femur from upward to downward, which can cause the contraction of the ipsilateral levator muscle, causing the testicles to be lifted up. Scrotal ultrasound scanning: there are generally two methods: 1, longitudinal scanning: with the left hand index and thumb to fix the testicle for longitudinal multi-planar scanning, in order to show the ultrasound structure of the testis, epididymis head and tail and part of the spermatic cord. Transverse scanning: compare the scrotal skin, testis and epididymis morphology, size and internal echo bilaterally, and observe whether there is fluid and abnormal echo in the sheath choking around the testis.