The examination of urinary tract infection includes urine examination, blood examination, and imaging examination, as follows: 1. Bacterial culture can be done by clean mid-segment urine, catheterization and bladder puncture. 2. Blood tests: including routine blood tests, blood leukocytes are often elevated in acute pyelonephritis, the percentage of neutrophils is also elevated, and blood sedimentation can be increased. The purpose is to understand the situation of the urinary tract and to detect in time whether there are urinary stones, obstruction, reflux, malformation and other factors that lead to recurrent urinary tract infections. For recurrent urinary tract infections or acute urinary tract infections, women who have had no effect for 7-10 days of treatment should have IVP. male patients, whether first or recurrent, should have a urinary tract x-ray to rule out anatomical and functional abnormalities of the urinary tract after excluding prostatic hypertrophy and also prostatitis.