The possible causes of genital enlargement: first, local infection caused by infection will appear mucosal congestion, edema, so the performance of enlargement, and can be manifested as mucosal redness, accompanied by increased secretions, etc., the cause of infection is mostly poor local hygiene, contact infection, or decline in their own immunity caused by. Second, trauma can cause local enlargement, such as direct blows or contusions, which can lead to bruising, congestion or cellular edema, so it is enlarged, accompanied by pain or obvious trauma, etc., and usually has a very clear injury process. Third, if there is ischemia or poor blood circulation diseases, such as circumcision Ganden can cause local blood, tissue fluid circulation, can cause enlargement, or the existence of vascular lesions, such as small artery sclerosis or atheromatous plaque obstruction of blood vessels, can lead to enlargement of the genitals with bruising, can be manifested as blue, black, accompanied by a significant increase in volume, etc..