What does Western medicine believe is the cause and pathology of functional uterine bleeding?

Fanfan has been married for several years, but still has no children. When they first got married, Fanfan and her husband agreed that they would work hard for two years before having children. This would not only prepare them psychologically, but also save some money to raise children. Two years passed in a blink of an eye. Her body, mind and reserve funds were ready, and the campaign to have a baby had begun. However, at this critical juncture, Fanfan encountered an unexpected situation, resulting in her infertility. In the past year, for some reason, Fanfan's menstruation was somewhat disordered, and each cycle was unstable. Her "period" came frequently, and it came again just a few days after it came. The amount of blood was also large each time, which made Fanfan dizzy and exhausted. Not only that, this matter also made Fanfan upset. How could she have children if she kept doing this? Her husband couldn't bear to see his wife's body getting weaker day by day, so he took Fanfan, who was unwilling to go to the hospital, to the hospital. As a result, she was diagnosed with functional uterine bleeding. This made the couple feel very puzzled. What was going on with this disease? What caused it?

Modern medicine believes that the reason for hemorrhage is that the body is affected by internal and external factors, such as excessive mental stress, changes in environment and climate, malnutrition or metabolic disorders, which can interfere with the mutual regulation and restriction of the hypothalamus-pituitary-ovarian axis through the cerebral cortex. When this relationship is abnormal, it manifests as ovarian dysfunction, which in turn affects the endometrium and leads to dysfunctional uterine bleeding.