Urinary tract infections in women can cause lower back pain. After urinary tract infection, bacteria may enter the kidney through the ureter, thus causing infection of the renal pelvis, which may cause back pain, and may be accompanied by a change in body temperature, and may be accompanied by more obvious symptoms of urinary tract irritation, with significant urinary frequency, urinary urgency, and painful urination. Patients are advised to immediately give a clean middle urine urine culture and drug sensitivity test and treat the infection with antimicrobial agents as soon as possible to avoid having further aggravation of the infection, resulting in urogenital sepsis or infectious shock. If the symptoms of urinary tract irritation are simple, you can choose oral medication, but combined with low back pain or combined with elevated body temperature, the infection will be considered to have spread to the upper urinary tract, it is best to choose intravenous fluids to treat the infection as soon as possible. For older women or those with weakened body resistance, hospitalization is recommended to prevent further spread of the infection with regular medication, which can cause systemic toxicity.