If the foreskin covers the head of the penis and cannot be turned up to reveal the head of the penis when a boy is of preschool age, it is normal as long as there is no difficulty in urinating or recurrent infections. If by puberty the foreskin is still covering the head of the penis and cannot be turned up to reveal the head of the penis, treatment is needed. If the foreskin covers the head of the penis and interferes with urination in a preschooler, this is also abnormal and needs to be treated in a hospital. If a preschooler has recurring glans phimosis, this is also abnormal and needs to be diagnosed and treated in a hospital. So if the circumcised boy does not have urinary obstruction and recurrent infections before school age, he can be left untreated for the time being. If he is still circumcised at puberty, it is recommended to go to the hospital for treatment.