If a woman has a small amount of vaginal bleeding that does not occur during menstruation, it is usually not normal. This abnormal vaginal bleeding can be caused by gynecological inflammation, such as uterine fibroids, ovarian disease, and cervical disease. Secondly, when the ovarian hormone level is unstable, it can also cause abnormal vaginal bleeding, and finally, the presence of chorionic malignant lesions and cervical malignant lesions should be considered. For this kind of abnormal bleeding, it is recommended to have a comprehensive gynecological examination, including ultrasound, hysteroscopy and cervical cancer screening, etc. In addition, routine white belt tests are also necessary. If the cause is found, active treatment is needed to avoid serious consequences due to delay.