Optimal Age for Circumcision
If a male has phimosis (excessively long foreskin) and does not undergo circumcision in a timely manner, it may adversely affect normal daily life; therefore, circumcision should be performed at an appropriate age.
The optimal age for circumcision is between 9 and 13 years.
In boys under the age of seven, the foreskin is typically longer and fully covers both the glans penis and the external urethral orifice. However, as puberty progresses, the penis gradually lengthens and increases in girth, causing the foreskin to recede.

By age 18, the glans penis is usually fully exposed. Nevertheless, approximately one-third of adult males retain foreskin that still covers the glans; the glans becomes visible only when the foreskin is manually retracted or during penile erection—this condition is termed “phimosis.”
Phimosis predisposes individuals to accumulation of smegma and debris beneath the foreskin. Prolonged neglect of hygiene may irritate the penis and potentially lead to local inflammation. During sexual intercourse, it may cause penile pain or even edema; in severe cases, it can result in glans necrosis.
In summary, circumcision should be performed at the appropriate age, following medical advice and with proper planning of related procedures.