Occasional early menstruation and low menstrual volume may be caused by factors such as excessive stress, staying up late, and stress. If early menstruation and low menstrual flow occur frequently, it may be caused by endocrine disorders, luteal insufficiency, thin endometrium and other factors. Menstruation is mainly influenced by estrogen. If endocrine disorders lead to insufficient hormone secretion, early menstruation and low volume. If a woman has insufficient luteal function, it will also affect normal menstruation with early and low menstruation. If the endometrium is thin and the posteriority is significantly less than normal, it will also affect normal menstruation. In order to avoid the situation of early menstruation and low menstrual flow, it is usually recommended to develop regular habits, avoid staying up late for a long time and avoid overworking. If you often have early menstruation and low menstrual flow, you need to go to the hospital for relevant examination.