Irregular menstruation is mainly caused by various reasons, such as the length of menstrual cycle and abnormal menstrual flow. There are also some abnormal symptoms around menstruation. The whole phenomenon is called irregular menstruation.

Generally, irregular menstruation can be divided into two categories, 1, which are caused by neuroendocrine disorders, including adolescent uterine bleeding and menopausal uterine bleeding. 2, caused by some organic changes in reproductive organs, including inflammation of reproductive organs. For example, endometritis, tumors, tumors in uterus and ovarian tumors, including some ovarian granulosa cell tumors that secrete estrogen and androgen, can also affect menstruation and may also cause irregular menstruation.