When women have intercourse for the first time, due to the rupture of the hymen, the vaginal wall is too tight, which can cause pain and a small amount of bleeding. If it is very painful, it is recommended to go to the gynecology department for a gynecological examination to determine if there is a laceration of the vulva and vaginal wall, and to treat the situation accordingly. If the wound is large, stitches should be applied. After intercourse, you can wash your vulva with warm water and apply erythromycin ointment and take anti-inflammatory drugs such as cephalosporin or amoxicillin for anti-infection treatment as time goes by.