The external genitalia of boys may have anomalies due to the many factors that affect them during embryonic development. The common ones are: incomplete descent of the testes, syringomyelia, hernia, prepuce, hypospadias, and other rare scrotal malformations of the penis. Due to the continuous development of medicine, especially the rapid development of pediatric surgery in recent years, basic and clinical research, the treatment of most diseases has a fixed treatment and effect, basically to achieve the purpose of treatment. I. Incomplete testicular descent: It is not difficult to diagnose, and the diagnosis can be confirmed if there is always no testicle inside the scrotum. It can continue to descend after birth, and generally will not continue to descend by 6 months of age. Treatment is necessary, and the objectives of treatment are: 1. permanent correction of the obvious visible defect; 2. psychological and mental damage to the affected child can be avoided; 3. malignant tendency can be easily detected in time; 4. reproductive function may be improved. Hormonal therapy, usually from 6 months to 1 year of age, is not very satisfactory and the drugs used, such as GNRH (gonadotropin-releasing hormone), are more expensive. It has been confirmed that the undescended testes have irreversible pathological changes after 2 years of age, so it is now affirmed that surgical treatment is necessary between 1 and 2 years of age. The surgical procedure is the fixation of the testis. Currently, it is usually an extra-syringomyelic fixation. Second, sphingomyelomeningocele: As the testicle penetrates the abdominal wall and descends into the scrotum, most of the locally formed sheath protrusions are not completely closed after birth, so that the fluid from the abdominal cavity flows into the scrotum and forms hydrocele, which is manifested as a cystic mass in the scrotum, the testicle can be within the mass, called testicular sphingomyelomeningocele, if the testicle is below the cyst, it is spermatic sphingomyelomeningocele, the cyst is very large including the testicle and spermatic cord, it is spermatic sphingomyelomeningocele The sphincter of the testicle is large and includes the testicle and the spermatic cord. Most sphincters can close on their own at the age of 1 year, and syringomyelia can heal on its own. A few require surgery. Our experience is that 9 out of 10 babies have it and 8 of them heal on their own. The first sentence is the incidence of this phenomenon and the second sentence is the prognosis. 1 year of age, if it does not heal on its own, requires surgical treatment because the unclosed sphincter conducts the abdominal temperature to the scrotum, where the appropriate temperature is 34 degrees, and the elevation has an impact on testicular development and damages the testes. The treatment is surgery with a small incision and high ligation of the sphincter. Inguinal hernia: Diagnosis: A mass appears on one or both sides of the groin and can reach the scrotum. It appears during crying and activity and disappears during calm sleep. The only treatment is surgery, the earlier the age of surgery is after 6 months of age, the better. The surgery takes about 10-15 minutes. When a child has another serious medical condition such as heart disease that prevents surgery, it can be treated with hernia belt compression, but this treatment may cause damage to the vas deferens and testicles. It is not recommended. When the lump appears and is painful, it is called an incarcerated hernia and must be treated urgently, with surgery 7 days after a successful manual reset and emergency surgery if the reset is not successful. Fourth, prepuce: The role of the foreskin is to protect the glans from trauma, gradually turning up and exposing the glans during growth, and the glans should be fully exposed at puberty. However, due to overgrowth of the foreskin and adhesion of the foreskin and glans, the glans cannot be gradually turned up according to the age of the foreskin and glans interstitial accumulation of scale and bacterial reproduction infection, foreskin scar formation, and become scarring prepuce. Pinhole-like opening, urination fine far hard. Treatment: If 3-5 years old cannot easily see 1/3 of the glans, it is recommended to seek medical attention for the current advanced circumcision, which is less painful and more convenient for inpatient or outpatient treatment. In addition, varicocele, hypospadias, occult penis, etc. are not uncommon, promptly to the appropriate specialist – pediatric surgery.