Cryptorchidism is the absence of a testicle in the scrotum or the presence of a testicle on only one side of the scrotum. It is a condition in which a baby boy is born with a unilateral or bilateral testicle that does not descend into the scrotum but remains anywhere in its normal descent. What are the health risks of cryptorchidism? The impact of cryptorchidism on health is manifested in two aspects: Firstly, cryptorchidism can affect the growth and development of testicles, thus leading to spermatogenic dysfunction and causing infertility. Secondly, cryptorchidism can greatly increase the chance of testicular cancer, which is a malignant tumor of the testicles, and according to the data, the chance of testicular cancer in cryptorchidism patients is 40 times higher than that in normal people. The best time for treatment is within 2 years old.