There are more reasons for having intercourse and menstruation after four days of menstruation, which may be caused by incomplete shedding of endometrium, endometrial polyps, cervical polyps, cervical lesions, ovulation bleeding and other reasons.
1. Incomplete shedding of endometrium: due to incomplete atrophy of the female corpus luteum or inflammation of the endometrium, resulting in irregular stripping of the endometrium, caused by incomplete stripping of the endometrium during menstruation.
2. Endometrial polyps: patients with endometrial polyps may have irregular vaginal bleeding.
3. Cervical polyps: Cervical polyps are brittle in texture, rich in blood vessels, and bleed easily when touched.
4. Cervical lesions: If there are lesions such as cervical cancer, there may be irregular vaginal bleeding, which may be accompanied by abnormal vaginal discharge.
5. Ovulation bleeding: The menstrual cycle is short, and the fourth day after menstruation may enter the ovulation period, resulting in ovulation bleeding, which is usually small.
After four days of menstruation, intercourse and menstruation can also be seen in other reasons, it is recommended that the patient timely medical care, improve the relevant examination, under the guidance of the doctor to clarify the cause of the disease, targeted treatment, to avoid delaying the condition.