Some women experience frequent back pain that may be related to menstrual periods, lumbar muscle strain, and urinary tract infections. It is recommended to consult a doctor in time to identify the causes and treat them under the guidance of the doctor. 1. Menstruation: Some women experience pelvic congestion before or during menstruation, which can cause lower abdominal pain and discomfort, accompanied by lumbar pain, which will be relieved after menstruation and return to normal. 2. Lumbar muscle strain: because most women bear most of the household chores, need to bend frequently, squatting, etc., long-term will lead to lumbar soft tissue labor injury, generally as long as the bed rest will be able to get better, if the improvement is not obvious can be massage to relieve. 3. Urinary tract infection: because the female urinary tract is relatively short, it is easy to make the outside world pathogenic bacteria invade which triggered infection, patients in addition to lumbago, there are frequent urination and urgency and other symptoms. There may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.