The first time sex will feel very painful, mainly because the hymen damage caused by individual differences, each person hymen thickness is different, so the degree of pain is not the same, the vast majority of the pain is tolerable. After the hymen is cracked, there will be no pain when you have sex again, and the first time after the hymen is damaged, there will be bleeding, the bleeding is fresh and the amount is relatively small. If there is a large amount of bleeding, similar to the amount of menstruation is an abnormal phenomenon, may be caused by the vaginal wall mucous membrane damage, or vulvar local skin damage and caused, we should go to the hospital in a timely manner to the appropriate treatment. Although this situation is relatively rare, but it does occur in clinical practice, once it occurs, we should consult a doctor in time.