How long does the foreskin need to be cut?

The definition of foreskin length refers to male foreskin is too long, completely covering the glans, if it is difficult to turn up called phimosis, if it can be turned up called foreskin is too long. Patients with phimosis must be operated, because phimosis is more harmful to male health, can lead to various infections of the male urinary system, but also has a certain connection with penile cancer. If the foreskin is too long, and often shows balanitis or urethritis, or often leads to infection of the woman, the patient had better perform circumcision.