Why do patients with uterine fibroids experience abnormal uterine bleeding?

Uterine bleeding is a common symptom of uterine fibroids. Patients will experience excessive menstrual bleeding, prolonged menstrual period, shortened menstrual cycle, etc. The main reasons are as follows.

1. Large area of ​​endometrial shedding

Multiple uterine fibroids or uterine fibroids that are too large can cause the uterine cavity to enlarge, and then the area of ​​the endometrium in the uterine cavity will also increase. Under normal circumstances, after the endometrium collapses and sheds, it takes about a week to repair. However, after the area of ​​the endometrium increases, the natural repair time will be relatively longer, and the patient will experience symptoms such as increased menstrual blood volume or prolonged menstruation.

2. Hinder uterine contraction

The presence of intramural fibroids in the uterus will inhibit the uterus from controlling bleeding through effective contractions, which will result in increased menstrual blood volume.

3. Associated endocrine dysfunction

Uterine fibroids often occur in menopausal women.

4. Endometrial venous plexus congestion and dilation

The uterine subserosa, intramural and endometrium are all richly distributed with blood vessels. Whether it is a submucosal, subserous or intramural uterine tumor, the nearby veins can be squeezed and congested or dilated, leading to increased menstrual blood volume.