1, urine routine examination: the urine color of patients with acute urinary tract infection can be cloudy and have a rotten smell. Urine protein is trace ± to +. The urine sediment has slightly increased red blood cells, 2 to 10 / high magnification field of view. Hematuria is evident in only a small percentage of patients, with less than 5% of patients having visible carnal hematuria and often a significant increase in leukocytes. This is a common test for male urinary tract infection. 2, urine sediment microscopy leukocytes: pus urine refers to a significant increase in leukocytes in the urine sediment. Pus urine is significant for the examination of male urinary tract infection. Doctors often rely on clinical manifestations and pus urine detection for diagnosis. 3, blood routine examination: patients with acute pyelonephritis, blood leukocytes may be mildly or moderately increased, neutrophils are increased and may have nuclear left shift phenomenon. Blood sedimentation may be accelerated. In chronic pyelonephritis, there may be mild anemia. 4, urine chemical test: chemical test is simple and easy to perform, in the urinary tract infection auxiliary diagnostic testing process, although the positive rate is low, but very few false positives. Generally used for large-scale screening. Because of the more false negatives, so the value is limited, and can not replace the quantitative culture of urine bacteria. Urine chemical tests include: ①Triphenyltetrazolium chloride test (TTC test). ② Nitrite test. This is also a common test for urinary tract infections in men.