What causes bleeding the day after sexual intercourse?

Bleeding the day after sexual intercourse may be caused by the following situations: 1. Vaginitis or cervicitis: If a woman suffers from vaginitis or cervicitis, the inflamed mucous membrane might become sensitive or damaged during sexual activity, leading to bleeding. 2. Cervical erosion: Certain cervical lesions, such as cervical erosion, may cause slight bleeding after intercourse. 3. Mid-cycle (ovulatory) bleeding: Some women experience light bleeding during ovulation due to the rupture of follicles and subsequent irritation of blood vessels near the ovaries. This typically occurs in the middle of the menstrual cycle. 4. Endometriosis: When endometrial tissue grows outside the uterus, pressure changes during sexual intercourse may trigger abnormal bleeding. 5. Hormonal effects: Fluctuations in hormone levels, such as those caused by starting or stopping birth control pills, may sometimes lead to intermittent bleeding. 6. Trauma from intercourse: Vigorous sexual activity may cause minor tears in the vaginal wall or cervix, resulting in bleeding. If the bleeding is heavy, persists for a long time, or is accompanied by pain, fever, or foul-smelling discharge, medical attention should be sought immediately.