The reason for female urinary tract infection is that the pathogenic bacteria invade the human body through ascending infection, bloody infection, direct infection, and lymph node infection, and break through the body's defense. About 95% are caused by a single bacterium, such as gram-negative bacteria, and 5-15% of urinary tract infections are caused by gram-positive bacteria. If the patient has stones, benign prostatic hyperplasia, tumors, strictures, and habitual urination, it may cause urine accumulation. Bacteria are not easy to be removed, and a large number of local reproduction may cause infection. When patients have urinary tract infection, they should receive treatment as soon as possible without delay. Usually pay more attention to local cleaning to prevent infection.