Coronary groove is not exposed is mostly caused by circumcision, phimosis, etc., can be conservative, surgery and other ways of treatment. 1. Foreskin: for the foreskin is too long, but the foreskin mouth is wide, easy to upturn the situation, generally do not need to deal with, clean up on time, maintain hygiene can be; such as the foreskin repeatedly caused by inflammation of the foreskin and glans, then need to carry out circumcision. 2. Surgical treatment: circumcision is required to remove the excessively long foreskin. If the patient is in the rapid development stage of puberty, surgical excision of the foreskin, only need to expose most of the glans, without exposing all the coronal groove, so as to avoid later erection pulling pain. If such a situation occurs, in order to avoid affecting the normal physiological development, should promptly go to the regular hospital standardized treatment.