The main symptoms of urinary tract infection are “urinary frequency, urinary urgency, and painful urination”, and some patients have visual hematuria, including lower urinary tract infection (urethritis, cystitis) and upper urinary tract infection (pyelonephritis), etc. In addition to the above symptoms, acute pyelonephritis also has fever, chills, and lumbago. The onset of urinary tract infection is related to a variety of factors, such as: 1. urinary tract obstruction; 2. urinary system malformation or functional abnormalities; 3. urethral intubation and instrumentation; 4. physiological characteristics of the female urinary tract anatomy and structure, sexual life; 5. reduction of systemic body resistance. I hope that patients do not use antibiotics indiscriminately, immediately after the onset of the disease to the hospital, check: urine routine + urine red blood cell morphology analysis, blood routine, urinary ultrasound and other tests, if there are white blood cells in the urine, then immediately after cleaning around the urethra, perform “middle urine bacterial culture + drug sensitivity test”, according to the culture of bacteria and sensitive antibiotics to choose the The most suitable antibiotics will be selected according to the bacteria cultured and the sensitive antibiotics, so as to achieve the most reasonable application of antibiotics and an adequate and effective treatment course. Preventive measures: drink more water, urinate more often, avoid holding urine; enhance physical fitness, eliminate various triggering factors; actively search for and remove inflammatory lesions; urinate immediately after female sexual intercourse, drink a lot of water; pay attention to the cleanliness of female vulva (after defecation, use hand towels from front to back, etc.); wear cotton, loose underwear, etc., and change them every day, and hang them outdoors after washing and disinfection by ultraviolet light.