In clinical practice, the decrease in menstrual flow is related to the following factors: the first is excessive dieting, which leads to nutritional deficiencies, protein deficiencies, and a decrease in subcutaneous fat, which can also reduce menstrual flow. Secondly, irregular life, staying up late at night, resulting in endocrine disorders, may also reduce menstrual flow. Thirdly, frequent anger and depression in daily life may reduce menstrual flow. Fourth, repeated abortions may cause damage to the endometrium and cause adhesions in the uterine cavity, especially some of the uterine cavity adhesions may lead to reduced menstruation. The fifth one is premature ovarian failure, for example, if ovarian function declines before the age of 40, the clinical diagnosis of premature ovarian failure can cause a decrease in menstrual flow.