The foreskin covers half of the glans, if you can flip the foreskin to reveal the glans and the coronal sulcus, it belongs to the circumcision, pay attention to hygiene and observe more; if you can’t flip the foreskin belongs to the circumcision, you need to operate in time. 1.The foreskin is too long: the penis in the state of weakness, the foreskin covers the glans, if the glans and the coronal groove can be completely exposed in the state of erection, or turn over the foreskin on the hand, the foreskin can be turned over, completely exposing the glans and the coronal groove, belongs to the foreskin is too long. Diligently turning the foreskin, cleaning secretions, no other complications, do not need special treatment. If necessary, circumcision. 2. Foreskin: the narrow opening of the foreskin, tightly hooped in the glans, can not turn the foreskin, can not reveal the glans and the coronal groove, belong to the foreskin, need to go to the regular hospital as soon as possible surgical treatment, circumcision. To summarize, if there is any discomfort, you should consult a doctor in time.