If the color of menstrual blood is coffee-colored and clinically accompanied by pain in the lower abdomen, it may be due to the following reasons: 1. Because of the abnormal position of the uterus, such as the uterus in anterior flexion anterior tilt position or posterior flexion posterior tilt position, which will make the menstrual blood flow out of the uterus unsmoothly. So when the menstrual blood is stagnant in the uterine cavity and then discharged outside the vagina it will become coffee-colored and clinically accompanied by dysmenorrhea. In this case, it is advisable to improve the position of the body during menstruation, for example, if the uterus is in retroflexion and retroversion, it is recommended to lie down on the bed and rest. If the uterus is anterior flexion anterior tilt position, it is recommended that a hot water bag can be applied to the abdomen, so as to improve the position of the uterus, which can make the menstrual blood flow more smoothly, reduce the situation of this kind of coffee-colored menstrual blood, and reduce the possibility of dysmenorrhea; 2, because of pelvic inflammation, resulting in this kind of coffee-colored bloody discharge, it is recommended that it is best to do a gynecological examination in clinical practice. If there is inflammation and actively give anti-inflammatory treatment, it will improve the situation of coffee-colored menstrual blood in the clinic.