The skin on the surface of the penile shaft is thin, soft and slides freely and is very stretchable. The skin at the front of the penis forms a free double fold that wraps around the glans, called the foreskin. Before the age of 7, the foreskin is long and completely covers the head of the penis and the external urethral opening. With the development of puberty, the volume of the penis increases and lengthens, the foreskin is retracted backward, and the head of the penis is exposed in adulthood.
It is normal for a child to have a long foreskin, but after puberty the head of the penis should gradually be exposed.
The foreskin is long: the foreskin covers the urethral opening, but can be turned up to reveal the urethral opening and the head of the penis. This disease is related to heredity and can be divided into true circumcision and pseudo-circumcision. Patients with circumcision should be treated with early surgery. For non-inflammatory circumcision, as long as the foreskin is often turned up and cleaned, surgery is also not necessary.
The circumcision refers to the narrow opening of the foreskin, which cannot be turned up to reveal the head of the penis. The prepuce is divided into congenital prepuce and acquired prepuce. When the mild epithelial adhesions between the inner plate of the foreskin and the surface of the penis head are absorbed, the foreskin recedes and the penis head is exposed. If the adhesions are not absorbed, congenital prepuce is formed. Acquired prepuce is mostly secondary to inflammation of the foreskin of the head of the penis, which causes scar contracture of the foreskin opening. If the prepuce is serious, it can cause difficulty in urination or even urinary retention. When the foreskin scale accumulates, there can be itching sensation on the head of the penis. Long-term chronic stimulation can induce infection and cancer, leukoplakia and stones.