Auntie usually refers to menstruation. Low menstruation may be caused by ovarian dysfunction, endometrial damage, endocrine disorders, malnutrition or systemic wasting disease. 1. Ovarian dysfunction: When ovarian dysfunction occurs, the level of sex hormones in the body decreases, and the endometrial proliferation decreases, leading to decreased menstruation. 2. Damage to the uterine lining: due to abortion, scraping and other uterine operations, the uterine lining is damaged, resulting in decreased menstrual bleeding. 3. Endocrine disorders: endocrine dysfunction due to external environmental changes, stress, diseases, etc. and abnormal hormone levels will lead to decreased menstruation. 4. Malnutrition or systemic wasting disease: excessive dieting and weight loss leading to malnutrition, or systemic wasting disease such as hyperthyroidism, cancer, etc., can also lead to reduced menstrual flow. Women with decreased menstruation need to consult a doctor for timely examination and standardized treatment under the guidance of a doctor.