There is no quick fix for menstruation in the clinic. The lack of menstruation may be caused by pregnancy and does not require treatment. It can also be caused by polycystic ovary syndrome, hyperthyroidism and other diseases, which can be treated with medication or surgery. 1. Pregnancy: If the patient is sexually active and does not use regular contraception, pregnancy may occur, causing the patient not to menstruate. This situation does not require treatment, and it is recommended to take pregnancy tests in time. 2. Polycystic Ovary Syndrome (PCOS): Symptoms of PCOS include scanty menstrual flow, amenorrhea, and menstrual disorders. Patients can use progesterone tablets, medroxyprogesterone acetate tablets and other progestins as prescribed by the doctor. Some patients can use clomiphene citrate tablets, letrozole tablets and other ovulation-promoting drugs. 3. Hyperthyroidism: Patients with hyperthyroidism will have symptoms such as menstrual disorders, low menstrual flow and amenorrhea. Patients can follow the doctor’s instructions to use the formamide imidazole tablets, propylthiothiophene tablets and other anti-thyroid drugs, can also take surgical treatment. In addition, the lack of menstruation may be caused by other factors besides those mentioned above. It is recommended that the patient should consult a doctor in time in order to identify the specific cause of the disease and give targeted treatment under the guidance of the doctor, and the use of specific drugs should be carried out under the guidance of the doctor.