Hi.... Its the collection of smegma under foreskin, which is usually normal.... Phimosis is the inability to fully retract the foreskin over the glans penis due to a narrow opening..... It is a consequence of poor hygiene..... Application of weak topical corticosteroid creams to the tip of the penis will be effective in several cases. Surgery is performed in cases where conservative treatment fails. Circumcision surgical removal of foreskin. is the only permanent cure.....