There is still controversy about the treatment and age of surgery for pediatric cryptorchid penis; some can be improved without surgical treatment, while others are recommended to be done before school age, preferably not beyond puberty. The diagnosis of cryptorchid penis can be made by a combination of short exposed penis, bird’s beak foreskin, prepubic fat accumulation and penile squeeze test. Some of the hidden penises will improve significantly with physical development or even heal on their own without treatment, but if there is no significant improvement before school age, timely surgical treatment is needed. To summarize, the pediatric hidden penis specific whether and when the best surgery, should be regular hospitals to consult a professional physician.