Brownish discharge on the underwear after the first time you have sex may be caused by a ruptured hymen, which is normal. However, if there is persistent bleeding, it may be caused by vaginal injury, menstrual flow, dysfunctional uterine bleeding, etc.
1. Ruptured hymen: There is a membrane-like structure at the opening of a woman’s vagina, which may rupture after the first time you have sex, resulting in a small amount of bleeding.
2. Vaginal injury: If there is persistent bleeding, there may be an injury to the vaginal mucosa and bleeding from the wound.
3. Menstrual flow: There may also be an overlap with the onset of menstruation, which can be determined based on previous menstrual cycles, menstrual flow, and so on.
4. Dysfunctional uterine bleeding: If the bleeding is heavy or persistent, it may also be abnormal uterine bleeding caused by endocrine dysfunction.
Therefore, brown discharge on the underwear after the first relationship is normal, but if there is persistent bleeding, you need to consult a doctor in time to check the cause, under the guidance of a professional doctor targeted treatment.