A little bit of vaginal bleeding unlike menstruation may be ovulatory bleeding, or it may be related to cervical polyps, endometrial cancer or other factors. 1. Normal phenomenon: If there is a small amount of vaginal bleeding in the middle of menstruation, it is usually ovulation bleeding, which is caused by bleeding after ovulation, and the amount is very small, obviously less than the usual amount of menstruation, and it usually stops naturally in 2~3 days, which is a normal phenomenon, and usually does not need treatment. 2. Cervical polyps: a manifestation of chronic cervicitis. Polyps appear singly or in groups, causing women to have increased secretion or small amount of vaginal bleeding in the middle of menstrual cycle, after sexual intercourse or after menopause. 3. Endometrial cancer: it is an epithelial malignant tumor that occurs in the endometrium, preferred in peri-menopausal and post-menopausal women, with clinical symptoms such as vaginal bleeding, vaginal discharge, pain, abdominal mass and so on. 4. Other factors: such as taking certain drugs, intrauterine device, blood diseases, etc., may lead to vaginal bleeding a little bit unlike menstruation. Therefore, if there is a small amount of vaginal bleeding, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease, and then follow the doctor’s instructions to deal with the treatment.