Abnormal uterine bleeding may be caused by ovulation disorder, endometrial polyp, adenomyosis and other reasons. 1. Ovulatory disorders: when the female gonadal axis function is abnormal, the body’s progesterone secretion is insufficient, the endometrium proliferates under the continuous stimulation of estrogen, and the endometrium irregularly peels off, which will cause abnormal uterine bleeding, such patients can supplement progesterone and dydrogesterone tablets to treat. 2. Endometrial polyps: women with endometrial polyps, the polyps are not treated in time, the polyps increase in size and press the surrounding endometrium, the response to estrogen and progesterone is changed, and they can’t be detached normally, which will lead to abnormal uterine bleeding, which can be treated by hysteroscopic endometrial polyp removal. 3. Adenomyosis: patients with adenomyosis, the invasion of the myometrium of the lesion leads to myometrium contraction, can also cause abnormal uterine bleeding, under the guidance of the doctor with danazol, progesterone treatment, conservative treatment is ineffective, through the surgical removal of the lesion. Abnormal uterine bleeding has more causes, to go to the hospital for examination and targeted treatment.