For comparison between foreskin and prepuce, of course, it is serious, the usual foreskin refers to the foreskin is too long, foreskin refers to the foreskin normally covers the head of the penis, the head of the penis can not be revealed, but the outer opening of the foreskin is loose, spacious, can naturally flip up to reveal the head of the penis. In contrast, circumcision is not only long but also narrow, so that the foreskin is completely constricted and the glans cannot be fully revealed, or even not at all, and in serious cases it may even affect urination. The purpose of the surgery is to avoid recurrent infections and even reduce the incidence of penile cancer in adulthood.