It is not normal for menstruation to end in two days. Consider short menstrual period and low menstrual flow, which are mostly related to endocrine disorders and multiple uterine operations. 1. Endocrine disorders: (1) Mental stress: for women who have more work pressure or often stay up late, it may lead to endocrine disorders, which in turn affects women’s normal ovulation, and the endometrium can’t be completely stripped off which will lead to low menstrual flow. (2) Gynecological endocrine diseases: for women with polycystic ovary syndrome, premature ovarian failure, etc., due to irregular ovulation or no ovulation, resulting in a lack of progesterone, which affects the stripping of the endometrium and leads to low menstrual flow. 2. Repeated uterine operations: For women who have repeated abortions, IUD removal, IUD and other uterine operations, the endothelial tissues will be damaged during the operation, which will result in low menstrual flow after the operation. For women whose menstruation ends in two days, it is recommended that they go to the gynecology department of a regular hospital to improve ultrasound, sex hormones and other relevant examinations, and then take active treatment under the guidance of the doctor after clarifying the cause of the disease.