Irregular menstruation in 17-year-old girls is mainly considered to be related to the underdevelopment of the gonadal axis, metabolic abnormalities, etc. 1. The gonadal axis is not yet developed: 17-year-old girls are still in puberty, and at this time the gonadal axis is not yet developed, so the endometrium can’t be developed and shed normally, which is reflected in the irregular menstruation cycle. The diagnosis is usually confirmed by the results of sex hormone six tests. You can take estrogenic drugs under the guidance of a professional doctor for treatment, such as ethinyl estradiol cyproterone tablets, etc. In addition, it is recommended that patients adjust their mindset and relax; 2, metabolic abnormalities: such as abnormal thyroid function. As menstruation is affected by the function of the thyroid gland, most female thyroid is also accompanied by menstrual abnormalities. At this time, you can take medication for thyroid disease under the guidance of a professional doctor. In daily life, eat more vitamin-rich fruits and vegetables, such as grapes, kiwi, tomatoes, etc. In addition, abnormal blood sugar, adrenal function abnormalities, etc. can also lead to irregular menstruation; 3. Other: menstruation is affected by the endocrine system, and factors such as large mood swings, stress, poor parent-child relationship, etc. can affect the endocrine system, which can lead to irregular menstruation. It is recommended to relax and relieve anxiety by participating in extracurricular activities, sports, etc. Psychological counseling is available for serious cases to relieve symptoms.