Is it really true that “male problems are the business of adults and have nothing to do with teenagers”? In most people’s eyes, male diseases are sexual dysfunction, low sperm count and azoospermia that lead to failure to have children… In fact, in Professor Li Zheng’s clinic, teenagers often come to see him because they can’t find their “balls”. The medical term for this is “cryptorchidism”. Untreated bilateral cryptorchidism can lead to sterility and even the possibility of developing into a malignant tumor of the testicles, which is extremely harmful. After birth, normal male testicles will descend into the scrotum and be protected by the scrotum, while cryptorchidism means that the testicles do not descend into the scrotum normally, but are hidden in the abdominal cavity or inguinal canal. The harm of cryptorchidism should not be underestimated, mainly the following points: 1. Testicular atrophy: Generally after 2-5 years old, the testicles do not descend into the scrotum, which will cause testicular underdevelopment or atrophy and affect the sperm production function of the testicles. 2.Infertility: The main function of testes is to generate sperm and provide male with androgen. The suitable temperature in the scrotum is conducive to the generation of sperm, if the testes are hidden in the inguinal canal or abdominal cavity where the temperature is high, they cannot generate sperm. Malignancy: congenital defects and abnormal position of the testes, high surrounding temperature and other factors can lead to malignant lesions of cryptorchidism, and the risk of malignancy is 20 to 48 times higher than that of normal scrotal testes. Inguinal hernia: Patients with cryptorchidism often have inguinal hernia due to incomplete testicular descent and imperfect development of inguinal canal, etc. Statistics show that about 65% of patients with cryptorchidism have hernia. 5.Psychological disease: Empty testicles can cause inferiority complex, mental distress and aloofness. Prof. Li Zheng pays special attention to the last item. He often says: “Physical diseases can be cured by drugs or surgery, but psychological consequences are unpredictable if they are not detected and enlightened early.” So “early detection, early treatment”. Let the “wandering” testicles “home” as soon as possible. At present, Dr. Chen Huixing of Prof. Li Zheng’s team can send the cryptorchid home through three 3mm incisions on the abdominal wall and a small scrotal incision by applying advanced laparoscopic technology, which avoids the huge trauma of traditional surgery. What is even more gratifying is that under the careful treatment of Prof. Li Zheng’s team, sperms appear in the semen of some patients with cryptorchidism and the patients can have their own children. With this article, I would like to warn young parents that when you are happy to see your son born, you should remember to check whether there are testicles in the scrotum of your baby. Some newborns with cryptorchidism may descend on their own within one year of age, but if it does not descend after one year of age, you should pay attention to it and send your child to the hospital for examination in time, so as not to delay the opportunity of surgery.