People's physique is different, the amount of menstrual bleeding and menstrual time are very different, and some external factors can also cause endocrine disorders and reduce the amount of bleeding.

1, excessive dieting. Long-term vegetarian diet leads to malnutrition, endocrine disorders and decreased menstrual flow;

2, working overtime and staying up late, with great pressure and bad rest. Long-term mental stress and insomnia will cause excessive contraction of blood vessels in the pelvic cavity, leading to decreased menstrual flow and even amenorrhea;

3. Emotional influence. Often angry and depressed, causing metabolic and endocrine problems in the body, causing a decrease in estrogen secretion, leading to a decrease in menstrual flow.

4, endocrine, estrogen and other factors. It is a common cause of less menstrual flow, such as abnormal secretion of various hormones or abnormal ovulation;

5. Endometrial factors. It may be the cause of endometrium itself, such as endometrial tuberculosis or induced abortion, endometrial thinning caused by curettage, etc.

6, uterine dysplasia. Some women's uterus is relatively small, and when the endometrium falls off, the amount will decrease, which is reflected in the small amount of bleeding.

7. Physical factors. Women with yang deficiency, qi deficiency and blood stasis are more likely to have less menstrual flow and dark color because of poor and blocked qi and blood.