The edge of the glans has a circle of swollen flesh to consider whether it is ordinary edema, usually circumcised people flip the foreskin or after frequent masturbation is easy to appear after the local stuck, will affect the blood flow and lead to edema, usually the symptoms will subside on their own. Inflammatory reactions such as glans will appear localized edema, accompanied by erythema and pain. There is also the possibility of condyloma acuminatum, if in addition to the swelling of the coronal groove is accompanied by skin lesions and pain, the possibility of condyloma acuminatum is more likely, due to the condyloma acuminatum is contagious, it should be given high attention. In addition, it may also be penile circumscribed granuloma, which is a relatively rare benign skin inflammation, and will not be contagious. It is not excluded that it may be a tumor, which needs to go to the hospital to do further pathological examination to determine, so it is recommended to closely observe the edema site with or without further development and whether there is pain, if necessary, should be timely to the hospital for confirmation of the diagnosis.