Bleeding 7 days after the end of menstruation is caused by the following situations: i. Ovulatory bleeding, a small amount of bleeding from the vagina about 7 days after menstruation, lasting for a few hours or 2-3 days, most of the bleeding is less than the amount of menstruation, which can be accompanied by a slight ovulation pain and lumbar acidity, which is a normal physiological bleeding and does not require any special treatment. ii. Functional uterine bleeding, which is more common in clinic, is a manifestation of endocrine disorders, with symptoms of irregular menstrual cycles, excessive menstrual flow, prolonged menstrual period or irregular bleeding. Third, the use of emergency contraceptive pills, often take emergency contraceptive pills may lead to changes in the menstrual cycle, especially repeated use will lead to menstrual disorders, bleeding, dribbling. Fourth, contact bleeding, most of the cases are bleeding in the vagina after sex, such as suffering from vaginitis, cervical erosion, cervical polyps, early cervical cancer, submucosal leiomyoma, etc., which will easily lead to irregular bleeding after sex or when the body is tired.