Vacation means menstruation. Poor menstruation and back pain may be caused by poor mood, or uterine fibroids, chronic pelvic inflammatory disease and other diseases. 1. Poor mood: if the patient is in a long time in mental tension, panic, anxiety, depression and other negative emotions, it is easy to cause menstrual disorders, menstruation has not been clean and back pain. 2. Uterine fibroids: the etiology of this disease is not clear, but studies show that it may be related to genetics, abnormal sex hormone levels, stem cell dysfunction, etc. Some patients may experience prolonged menstrual periods, lower abdominal pain, back pain and other symptoms, which can be manifested as menstrual periods that are never clean and back pain. 3. Chronic Pelvic Inflammatory Disease: This disease is mainly caused by Chlamydia trachomatis, Neisseria gonorrhoeae, Mycoplasma, aerobic bacteria and other pathogenic microorganisms infections, which can be spread through the lymphatic system, the mucous membranes of the reproductive tract and other channels. Some patients may have the symptoms of irregular menstruation and low back pain, as well as low-grade fever and fatigue. It is recommended that patients with irregular menstruation and low back pain go to the hospital for consultation to clarify the specific cause.