If the foreskin mouth is close to the external urethral orifice, the foreskin can easily turn up to the coronary sulcus, which is slightly longer;
If the foreskin mouth exceeds the external urethral orifice and the foreskin mouth is too small to turn up to the coronal groove, it is phimosis.
The fourth type must be circumcised, and the second type generally does not need (no complications) but needs daily cleaning. The third kind of operation can be selected according to your own wishes or your own situation. In this case, there are generally more people with too long false foreskin.