The main reasons for not having a period for 2-3 months include the effects of mental and environmental factors as well as pregnancy, but also endometrial abnormalities, anterior pituitary lesions or dysfunction, hypothalamic dysfunction and other factors, which can be targeted according to the cause. 1, mental and environmental factors: patients with high mental stress, frequent late nights, environmental and climate changes may also lead to hormone level disorders, which can cause amenorrhea. Patients should relax their minds, avoid tension, develop a healthy lifestyle, go to bed early and wake up early, avoid staying up late; 2, pregnancy: pregnancy can lead to the suspension of menstruation, if a pregnant woman with a positive sex life, the first consideration should be pregnancy, available early pregnancy test paper or blood test blood HCG, can also do ultrasound to see if pregnant. If you are pregnant, there is no need to worry, you can supplement folic acid under the guidance of your doctor and have regular prenatal checkups; 3. Ovarian amenorrhea: Patients with low ovarian sex hormone levels and no cyclical changes in the endometrium can lead to ovarian amenorrhea. Patients can take estrogen and progestin as prescribed by the doctor for treatment; 4. Endometrial abnormalities: If the patient’s endometrium loses its normal response to ovarian sex hormones, it can lead to uterine amenorrhea, and the patient should go to the hospital for hysteroscopy in time. If caused by endometrial adhesions, treatment can be performed using contrast or hysteroscopy. If it is endometrial tuberculosis, it needs to be treated with anti-tuberculosis drugs such as rifampin as prescribed by the doctor; 5. anterior pituitary lesions or dysfunction: patients with organic lesions or dysfunction of the anterior pituitary gland can affect the secretion of gonadotropins, which in turn affects ovarian function and causes pituitary amenorrhea, at which time patients can use estrogen and progestin cycle therapy with estrogen and progestin drugs under the guidance of the doctor Combined treatment to restore menstruation, and if necessary, surgery; 6. Hypothalamic dysfunction: as hypothalamic dysfunction affects the pituitary gland, which in turn affects ovarian endocrine function and causes hypothalamic amenorrhea, patients should undergo different treatments according to their own situation, if patients have fertility and need to actively induce ovulation, clomiphene can be used under the guidance of a doctor, and if necessary, surgery is required.