The male testicles are commonly known as balls. The vast majority of boys are born with their testicles having descended down the inguinal canal into the scrotum, but a very small number will not have their testicles fully descended until around the age of 1 year, with the chances of descent decreasing significantly after that age. Cryptorchidism, also known as undescended testis or incomplete testicular descent, is the failure of the testis to descend from the posterior peritoneum of the lower back to the scrotum according to the normal course of development, and it is the most common pediatric urological condition. Most cryptorchidism is unilateral and about 15% is bilateral, with a higher incidence in preterm and hypospadias children. Cryptorchidism can be divided into four categories: intra-abdominal testes, testes in the inguinal canal, ectopic testes, and retracted testes. The testes remain in the abdominal cavity or inguinal canal for a long time and are affected by the “high temperature” in the body, which can easily cause male infertility. Due to the change in the growth environment of the testicles, the testicular cells may undergo malignant changes and form malignant tumors. How do parents look for testicles in daily life? The main manifestation of cryptorchidism is that the scrotum on the affected side is empty. Unilateral scrotum development is asymmetrical, and the scrotum on the affected side is poorly developed and empty. Bilateral ones show poor scrotal development or even no obvious scrotum, and testicles cannot be touched in the scrotum. Examination method: 1, the boy at home in the bed lying position, or sitting position, its legs are abducted, the temperature to maintain room temperature. 2.Parents’ hands must be warm to avoid the cold stimulation caused by the testicle retraction when touching. 3.Parents touch the scrotum with both hands, when touching the testicle, the child will feel uncomfortable. If the testicle cannot be touched in the scrotum, the inner ring and inguinal area will be examined carefully and most cryptorchid testes can be touched on the surface of the body. 4, the scrotum can not touch the testicle or touch and then retracted to the groin, go to the hospital. Main treatment: 1, hormone treatment, mostly for children within 1 year old. 2.Surgical treatment, once the diagnosis of cryptorchidism is confirmed, the child can be operated after 6 months, not later than 2 years old. If found that testicular hypoplasia or atrophy need to perform orchiectomy. Once again, parents of young boys are reminded that they should care about their children’s sexual organs and touch their testicles, none of which should be missing, so as not to delay the happiness of their children’s life because of a moment of carelessness.