What causes too much menstrual flow?

Menstruation is too much is not normal, the main reasons are as follows, 1, consider is caused by neuroendocrine disorders, if the hypothalamus or pituitary function instability may lead to excessive menses. 2, consider is caused by ovarian function, if poor ovarian function will cause endometrial hyperplasia, so show more menstrual volume, may also be caused by other genital diseases, such as genital inflammation or malignant tumors. Other conditions may also cause this condition, such as adrenal cortical dysfunction or thyroid abnormalities may cause this problem, and other external factors such as drug factors or other iatrogenic factors cannot be completely ruled out.