Phimosis, a condition wherein the (tight) foreskin of the penis cannot be retracted (moved behind the head of the penis). The definition of phimosis is the inability to retract the penis foreskin over the glans of the penis. Phimosis is common in children and young adolescents. It usually stops being a problem by the age of 3 and by the age of 10 most uncircumcised boys will be able to pull their foreskin back on to the head of the penis.
For some, it may not retract completely until they are about 17-years-old. Phimosis can be due to ballooning of the penis glans due to infection of the penis glans and/or Urinary Tract Infections. In adults, especially diabetics, infections may lead to phimosis and cause urinary tract obstructions with dribbling urine.