The term “great aunt” generally refers to a woman’s menstrual period. There are many reasons why menstrual flow may be particularly low, which may be caused by endocrine disorders, anemia, polycystic ovary syndrome or endometrial damage. 1. Endocrine disorders: Low menstrual flow or irregular menstruation may be caused by endocrine disorders in the body due to irregular lifestyle or excessive mental stress. 2. Anemia: Low menstrual flow may also be caused by anemia. Women may have reduced menstrual flow due to anemia, and in addition, women may also have pale face, dizziness, fatigue and other symptoms. 3. Polycystic Ovary Syndrome (PCOS): If a woman’s menstrual flow is low, it may also be caused by polycystic ovary syndrome (PCOS), in which the patient’s estrogen secretion is low and the endometrium cannot proliferate sufficiently, which may lead to low menstrual flow and scanty menstruation. 4. Endometrial damage: If a woman undergoes repeated abortions, etc., which cause damage to the endometrium, the patient may also experience low menstrual flow. The cause of scanty menstruation cannot be accurately determined by itself, but needs to be combined with the characteristics of the medical history and other test results in order to make an accurate judgment. It is recommended that the cause of the disease be clearly defined under the guidance of a doctor, and that targeted treatment be actively pursued.