Women suffer from urinary tract infection, the possible causes are as follows: 1, the decline of their own resistance, or local mucous membrane resistance to decline and other factors, resulting in bacterial invasion and the formation of urinary tract infection. If a woman has a combination of other systemic infections, such as upper respiratory tract infections or the presence of causative factors, such as prolonged exertion, low water intake, prolonged urine holding, etc.. It is also possible that the local mucosa is incomplete due to trauma, which causes bacteria to invade the urinary tract more easily and cause urinary tract infections. 2. Local bacterial virulence increases or exposure to an abnormal increase in bacteria, which leads to urinary tract infections. For example, through unclean sexual contact, resulting in abnormal germs invade the urethra and cause infection. The invading bacteria multiply locally, resulting in increased virulence and the formation of urinary tract infections. For example, contact with gonococcus, mycoplasma, and chlamydia can cause urinary tract infections. It also includes inattention to personal hygiene, which leads to the proliferation of locally colonized bacteria and the formation of virulent infections in the urinary tract.