There are many reasons for women to have white menstrual blood, mainly including scanty menstrual flow, damage to the uterine lining and abnormal hormone secretion. It is recommended to consult a doctor in time to find out the cause and treat it under the doctor’s guidance. 1. Scarcity of menstrual flow: It is often seen in patients suffering from anemia, and the symptoms of scarcity of menstrual flow and shortening of physiological cycle are often seen during physiological period. 2. Damage to the endometrium: it may indicate that the patient has corresponding lesions in the uterus, such as endometrial adhesions, which affects its normal shedding, and may also lead to symptoms of reduced menstrual flow and whitish menstrual blood. 3. Hormone secretion abnormality: it may suggest that the patient’s ovarian endocrine function is impaired, and the hormones in the body are at an abnormal level, resulting in symptoms such as reduced menstrual flow and whitish menstrual blood. There may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.