What happens if there is bleeding during intercourse while on your period?

　　"Big Aunt" is a colloquial term for menstruation. Having sexual intercourse during menstruation and experiencing bleeding may increase the risk of infection, cause excessive bleeding, prolong the menstrual period, worsen abdominal pain, and increase the risk of endometriosis, all of which significantly harm female reproductive health. If bleeding persists, severe abdominal pain occurs, or fever develops, prompt medical attention is recommended.

　　1. Increased risk of infection: During menstruation, the cervix is slightly open and the uterine lining has exposed wounds. Sexual intercourse can introduce bacteria, leading to vaginal infections, cervicitis, or endometritis. In severe cases, pelvic inflammatory disease may develop, potentially affecting future fertility.

　　2. Abnormal increase in bleeding: Sexual activity stimulates stronger uterine contractions, causing a sudden increase in menstrual flow and prolonged spotting. Large blood clots may appear, increasing the body's burden from blood loss.

　　3. Prolonged menstrual period: The combination of abnormal uterine contractions and infection can disrupt the normal repair process of the endometrium, significantly extending the duration of menstruation—periods that normally last 3–7 days may extend beyond 10 days.

　　4. Worsened abdominal pain: Intercourse-induced strong uterine contractions can intensify menstrual cramps and may also lead to lower abdominal pressure, soreness in the lower back and sacral area, with some individuals experiencing pain lasting several days.

　　5. Increased risk of endometriosis: Uterine contractions during intercourse may force shed endometrial fragments into the pelvic cavity, potentially causing endometriosis, which could later result in progressively worsening dysmenorrhea and infertility.

　　After bleeding occurs, sexual intercourse should be stopped immediately. Clean the external genital area gently with warm water to maintain hygiene; change to clean sanitary pads frequently to prevent bacterial growth; consume warm, easily digestible food and avoid raw or cold foods; rest adequately and minimize physical activity to promote recovery.