Usually, the glans is exposed at the age of 13, which is considered normal and not too problematic. Boys in the birth of the glans are wrapped in the foreskin, with the growth of age, generally around puberty, the development of the penis faster than the foreskin, so that the foreskin gradually back, the head of the penis gradually exposed, this is conducive to let the foreskin to maintain local hygiene and cleanliness, to prevent glans inflammation, if the glans is not exposed, this case belongs to the foreskin is too long, it is necessary to carry out circumcision for the treatment of the circumcision. Due to the development of each child is not the same, so the development of the penis is also slightly different, most of them are in the period of 11-18 years old, so this stage should pay attention to penile hygiene and cleanliness, as far as possible every day to upturn the foreskin for cleaning, in order to prevent the occurrence of glans dermatitis.