Menstrual blood is dark red, venous blood with a relatively uniform texture. Menstrual blood that is too thin in texture is a sign of abnormality. From a TCM perspective, this is due to blood deficiency, and from a Western medicine perspective, it is caused by anemia. Due to the monthly blood loss during menstruation, women are more prone to anemia. When women suffer from ovarian endocrine dysfunction or gynecological diseases such as uterine fibroids and uterine polyps, resulting in excessive menstrual blood and long periods, they are more likely to suffer from blood loss anemia. Some women are afraid of gaining weight and over dieting, partial eating and picky eating, which may lead to insufficient nutrient intake and cause malnutrition anemia. When anemia occurs, it can affect women’s menstruation, leading to scanty menstruation, low menstrual blood volume, light color, and even amenorrhea in severe cases. When this symptom occurs, you should go to the hospital in time to have routine blood tests done to clarify the diagnosis, and after the diagnosis is confirmed, you can take food or medication to correct the anemia according to the specific condition.