Bleeding on the 9th day of menstruation with symptoms of abdominal pain may be due to fibroids, endometriosis or adenomyosis, endometriosis, etc. And of course, spontaneous abortion or ectopic pregnancy. The normal duration of a woman’s period is 2-8 days, with an average of 4-6 days. If you are still bleeding after 9 days of menstruation and have symptoms of abdominal pain, it may be related to the following diseases: 1. Uterine fibroids are the most common benign tumors of the female reproductive system, and when they are relatively small, they may not have any symptoms. However, if the fibroids are large, or if they are submucosal fibroids, they may lead to increased menstrual flow, prolonged menstrual period, vaginal irregularities, etc. 2. If you usually have dysmenorrhea and now you have prolonged periods and abdominal pain, it is likely to be caused by endometriosis or adenomyosis. If there are these two diseases, patients may have progressive worsening symptoms of dysmenorrhea, as well as increased menstrual flow and prolonged menstrual period. 3. Endometrial cancer is one of the three major malignant tumors of the female reproductive system. Women who are not menopausal will show increased menstrual flow, prolonged menstrual period and increased vaginal discharge. Postmenopausal women will mainly manifest irregular vaginal bleeding after menopause. 4. Women who are sexually active and experience this symptom need to have a blood test for HCG to determine if they are pregnant. Spontaneous abortion or ectopic pregnancy may cause symptoms such as drenching bleeding and abdominal pain. There are many possible reasons for bleeding with abdominal pain on the 9th day of menstruation, so it is recommended that the patient consult a doctor promptly and receive appropriate treatment after diagnosis.