The undescended testicle of 2-year-old children can be treated with hormone therapy or surgery. It should be treated in time so as not to lead to infertility, malignant changes and so on. Undescended testicles, i.e. cryptorchidism, mostly occurs in infants and young children, can be caused by decreased sensitivity of testicles to sex hormones, etc. If untreated, it will lead to infertility, malignant changes, hernia, etc. It can be treated by hormone or surgery. 1. Hormonal treatment: Treatment can be done with, for example, human chorionic gonadotropin (HCG). 2. Surgical treatment: including open surgery testicular descent fixation, laparoscopic surgery, autologous testicular transplantation, etc. Cryptorchidism should be treated early, and the optimal age is 6 to 12 months after birth. The best age is 6~12 months after birth. 2 years old children whose testicles have not dropped should seek medical examination and receive treatment in time.