The causes of menstrual disorders due to endocrine disorders are as follows: 1. abnormal ovarian function: only ultrasound tests and with reproductive six tests are needed to assess the presence of abnormal ovarian function leading to irregular menstruation; 2. thyroid disease: either hypothyroidism or hyperthyroidism may lead to menstrual cycle changes and irregular menstrual cycles; 3. polycystic ovary syndrome: it is also common cause of irregular menstruation. For the treatment of polycystic ovary syndrome, you can choose to apply drugs to reduce androgens, drugs to improve insulin resistance, short-acting contraceptives, and drugs to adjust the menstrual cycle.