Urinary tract infections are purulent inflammation of any part of the genitourinary system caused by nonspecific bacteria and are collectively referred to as urinary tract infections. It includes upper urinary tract infections and lower urinary tract infections, both of which sometimes coexist and are not easily distinguished. According to the symptoms of urinary tract irritation, pus urine and positive urine bacterial culture. Specific testing methods are as follows: 1. Laboratory tests: including blood routine, urine routine, urine smear microscopy bacteria, midstream urine culture + drug sensitivity, blood bacterial culture + drug sensitivity, urine antibody wrapped bacteria test and so on. Routine urine examination can be seen with white blood cells, red blood cells or protein. The diagnosis can be confirmed by a mid-stage urine culture with a bacterial count >105/ml, or by an oil microscopic examination of the urine sediment with a white blood cell count >1, or by a positive urine culture by cystocentesis. Urine antibody parcel bacterial test is mostly positive for upper urinary tract infection, while lower urinary tract infection is mostly negative; 2. Imaging tests: ultrasound, abdominal plain film, intravenous pyelogram, etc., and CT or nuclear magnetic examination can also be chosen.