If the foreskin is too long, you can use your thumb to turn the foreskin to expose the glans; if it is prepuce, you can’t expose the glans even if you turn the foreskin, and then you should have surgery. 1. Hypospadias: Hypospadias refers to the penis in the state of weakness, the glans is wrapped by the foreskin can not be exposed naturally, but after turning the foreskin by hand, the glans and the coronal sulcus can be exposed, and it is also possible that the glans can be exposed in the state of erection. 2. Phimosis: Phimosis means that the opening of the foreskin is very narrow, and the glans can not be exposed by turning the foreskin by hand, at this time, you should go to the hospital as soon as possible to take surgical treatment, such as circumcision. If there is a long foreskin or phimosis, it is recommended to go to the regular hospital to find a professional doctor for treatment.