There is a debate about the best age for surgery for cryptorchid penis, which can be done around 5-6 years of age or after puberty. Different experts have different opinions on the best time for pediatric cryptorchid penis surgery. It is generally believed that 5~6 years old and puberty is a critical time point because the penis temporarily stops developing between 6 years old and puberty. Therefore, if the child’s symptoms are more serious and he or she may experience low self-esteem and psychological pressure after school, it is recommended that the surgery be done around the age of 5 to 6 years before school. Children’s cryptorchid penis can partially heal on its own, and at puberty, the penis will develop again, and a less severe cryptorchid penis can completely heal on its own. Therefore, if a child’s hidden penis symptoms are not serious, does not affect urination and socialization, and the glans can be exposed above the foreskin, he or she can not have the surgery for the time being, and wait for puberty to observe whether it can be self-healed before deciding to have the surgery.