The presence of coffee-colored blood in the vagina three or four days before the onset of menstruation, accompanied by lumbago, may be due to emotions, external causes or luteal insufficiency, endometriosis and other reasons.
1. Non-pathological reasons: If a woman has recent large emotional fluctuations, changes in the living environment, recent late night, excessive weight loss, taking drugs, etc., may have a certain impact on the endocrine hormones, resulting in brown discharge before menstruation.
2. Luteal insufficiency: If the female luteal insufficiency, progesterone secretion is insufficient, the endometrium can’t proliferate normally, there may be three or four days before the menstrual period, the menstrual blood is coffee-colored and lasts longer, at this time, the local nerves are more sensitive, and may be accompanied by lumbago.
3. Endometriosis: When this disease occurs, the endometrium grows in other parts of the uterus, which will cause obvious pain during menstruation, accompanied by low back pain, and there may also be a coffee-colored bleeding three or four days before menstruation.
Coffee-colored bleeding three or four days before the onset of menstruation and accompanied by back pain may also be associated with other factors such as pre-miscarriage, uterine fibroids, endometritis, etc. It is recommended that this condition should be treated in a timely manner in a hospital under the guidance of a doctor.