When amenorrhea occurs at the age of 30, it is important to investigate the causes of amenorrhea. The following conditions may lead to amenorrhea: 1. Polycystic ovary syndrome, which can lead to amenorrhea if not actively intervened in. Oral progesterone can be used to promote menstruation, and when menstruation comes, according to laboratory tests, according to the results of ultrasound and then systematic treatment. 2, because in the recent history of uterine operations, resulting in extensive adhesions in the uterine cavity and cause amenorrhea. It is necessary to do hysteroscopy to separate the adherent tissues, and then put on a birth control ring to avoid re-adhesion, and after the operation, give oral treatment with Tonicardis, which is expected to restore menstruation. 3, caused by premature ovarian failure, through the examination, we can learn that the follicle count has been abnormally high, and once there is a premature failure of the ovary is often irreversible, it is recommended that we actively prevent the occurrence of osteoporosis and cardiovascular disease.