The term “first time” here refers to the “first time having sex”. There is no specific standard for how long a girl’s first sexual intercourse will hurt, and the exact amount of time will depend on the cause and extent of the pain. 1. If first time sex pain is caused by a ruptured hymen or vaginal laceration, sometimes vaginal bleeding will occur. If the degree of injury is light and the amount of bleeding is small, the pain may last for a few minutes or a few hours and disappear on its own; if the degree of injury is heavy and the amount of bleeding is large, you need to consult a doctor in a timely manner for emergency treatment such as compression to stop bleeding, and the pain may last for several days. 2. If the pain of the first sexual intercourse is caused by vaginal cramps or vaginal dryness, there is generally no vaginal bleeding symptoms. Can be appropriate to ease the girl’s mental tension, so that the vagina is in a relaxed state, or use to do enough sexual foreplay, apply lubricants and other ways to increase vaginal wetness, in order to ease the pain of sexual intercourse. When having sex for the first time, both parties should keep the pubic area clean, the action should not be too strenuous, and do a good job of contraceptive measures. If there is any discomfort, you should stop having sex immediately and go to a regular hospital in time, under the guidance of the doctor.