What are the hazards of having an overly long foreskin?
Some men experience phimosis (excessively long foreskin). If left untreated, it may adversely affect health—including penile injury, premature ejaculation, infections, and infertility.
① Penile Injury
With phimosis, the foreskin and glans penis are prone to adhesion. Since the glans remains enclosed within the foreskin, it may become constricted, impairing normal glans development. In severe cases, the coronal circumference of the glans may be significantly reduced, thereby interfering with sexual intercourse.
② Premature Ejaculation
In cases of phimosis, the glans remains constantly covered by the foreskin, resulting in reduced tactile stimulation and friction. Consequently, during sexual intercourse, the glans becomes hypersensitive, potentially triggering premature ejaculation.

③ Infections
Phimosis creates a warm, moist environment conducive to bacterial growth and proliferation. Over time, this may lead to accumulation of smegma (foreskin debris), predisposing individuals to balanoposthitis or urinary tract infections. Improper management may further precipitate other inflammatory conditions, such as prostatitis or orchitis.
④ Infertility
Phimosis may compromise male fertility. Failure to maintain adequate hygiene or delay in undergoing circumcision allows smegma accumulation, which can contribute to prostatitis—thereby impairing sperm motility and altering seminal viscosity—ultimately leading to infertility.