Urinary tract infections, or urinary tract infections, are inflammatory diseases of the urinary tract caused by bacteria and others. Pyelonephritis is the most common. They can be divided into lower urinary tract infections such as urethritis and cystitis and upper urinary tract infections such as ureteritis and pyelonephritis. Lower urinary tract infections can exist alone, while upper urinary tract infections are usually associated with lower urinary tract infections. The two are usually not easily distinguished and are often referred to collectively as urinary tract infections. The most common pathogenic bacteria are Escherichia coli, followed by S. cerevisiae, S. alginolyticus, Enterococcus, and Staphylococcus, which often cause morbidity through infectious routes such as upstream infection, lymphatic system infection, hematogenous infection, and direct infection. The rational application of antimicrobials in urinary tract infections is crucial 1. The first occurrence of cystitis is often given as single-dose therapy, i.e., only one large dose of antibiotics is taken. 2, pyelonephritis mild fever and lumbago or single-dose therapy for urinary tract infections that have failed, oral antibacterial drugs should be used for 2 weeks, if the urinary bacteria are still positive should be changed to the appropriate drug according to the drug sensitivity for 4 weeks, for a small number of symptoms are more severe with systemic infection symptoms or signs of sepsis, should be combined with the application of antibiotics intravenous drug administration treatment. 3, recurrent urinary tract infection, commonly in pyelonephritis, for such patients should first correct the factors that cause poor urinary flow. In addition, antibacterial drugs should be selected for treatment according to drug sensitivity, and the general duration of treatment is 6 weeks. Patients with recurrent urinary tract infections should drink more water and urinate regularly, which is one of the important measures to cooperate with antibacterial drug treatment. Warm tip: please combine the specific medication with clinical, by the doctor face to face guidance shall prevail.