Hello, after puberty, all or most of the glans of normal men are exposed. If the glans penis cannot be exposed, the foreskin still wraps all or most of the glans penis, but the foreskin can be turned up or exposed by hand after erection, which is called the foreskin is too long. Harm of long foreskin: it hinders penis development, causes penis inflammation, damages renal function, affects women's health, and has the risk of cancer. It is recommended to clean the vulva every day and keep it dry. If inflammation often occurs, it is recommended to go to a regular hospital for circumcision. 1