Bleeding below, but not menses.

There are many conditions that can cause abnormal uterine bleeding. Common structural factors that cause uterine bleeding include uterine fibroids, especially submucosal fibroids, adenomyosis, endometrial polyps, uterine incision diverticulum, endometrial dysplasia, and endometrial cancer. Nonstructural uterine factors that cause bleeding include coagulation disorders, ovulation disorders, endometrial hyperplasia, and rings. In addition, for abnormal uterine bleeding, attention should be paid to exclude pregnancy-related diseases, such as threatened abortion, ectopic pregnancy and cervical lesions, such as cervical polyps, cervical cancer, cervical precancerous lesions, etc.