The first time to have sex, not always occur bleeding. 1, the first time to have sex bleeding, mostly related to the hymen ring rupture. The shape and elasticity of the hymen ring has individual differences, so there may be the first time to have sex without bleeding, can not be based on whether there is bleeding to determine whether there is a history of previous sex. 2, bleeding during intercourse in addition to the hymen ring rupture, but also may be associated with the vaginal wall and other parts of the tear, mostly in the case of gynecological inflammation, and sexual intercourse is too rough caused by action. Or village in the genital deformity, such as vaginal septum or mediastinal fissure, etc., the bleeding of such cases, most of the amount is relatively large, need to consult the hospital in a timely manner, and if necessary, give suture to stop bleeding. 3, most women due to the presence of the hymen ring, as well as the first sexual tension, there may be a small amount of bleeding, most of the time can be stopped by themselves, do not require special treatment.