Normally the foreskin should not be wrapped around the glans. The normal glans should be exposed and visible, and the foreskin is located behind the glans, which is the normal foreskin, so the foreskin should not enclose the glans under normal circumstances.
If the penis is in a state of weakness or after erection, the foreskin covers the entire glans, the glans can not be fully exposed, and there is a piece of the area outside the urethral opening belongs to the phimosis.
If the penis is in a non-erectile state, the foreskin only covers part of the glans, and the glans can be fully exposed in the erectile state, this is the normal performance of the foreskin is not too long.
If the patient is not sure whether the foreskin is too long, you can visit the urology department and let the doctor make a judgment. If the excessively long foreskin will lead to inflammation of the glans, you can do circumcision under the guidance of the doctor.