It is not normal for patients with polycystic ovary syndrome to experience menstruation twice a month after being treated with Chinese medicine. A woman’s normal menstrual cycle is 21 to 35 days, with an average of about 28 days. Women with polycystic ovary syndrome may experience scanty or amenorrhea periods and irregular vaginal bleeding. If you are sure that you have polycystic ovary syndrome, you can take herbs to regulate it under the guidance of your doctor. However, if menstruation occurs twice a month after using the medicine, this is likely to be irregular vaginal bleeding caused by polycystic ovary syndrome, indicating that the effect of using the medicine is not very good. If the effect of Chinese medicine is not good, you can take short-acting contraceptives under the guidance of the doctor ethinyl estradiol cyproterone tablets, drospirenone ethinyl estradiol tablets, etc. to regulate, can reduce the body of androgen, but also can adjust the menstrual cycle. Patients with polycystic ovary syndrome, if they are more obese, must pay attention to the appropriate increase in the amount of exercise, diet control, conducive to the treatment of the disease.