Fever caused by urinary tract infection can take about 3 days to control the temperature with adequate treatment. If the infection is not effectively controlled, it can cause persistent high fever or further increase in body temperature, and the application of antibiotics needs to be adjusted according to the patient’s urine culture results. If the urinary tract infection is hematologically invasive causing bacteremia, chills and hyperthermia may occur. If the infection is only localized and there is no systemic infection, the temperature will not rise and there will only be symptoms of frequent or urgent urination or a feeling of incomplete urination. That is, a urinary tract infection with fever indicates further aggravation of the infection. Further treatment with intravenous fluids or oral medication is required. The prerequisite for treatment must be a clean midstream urine culture and a drug sensitivity test to select sensitive drugs for treatment.