Urinary tract infection is one of the common diseases of the urinary system. According to incomplete statistics, the incidence of urinary tract infections in women under 40 years of age is about 8-10 times higher than that in men, and urinary tract infections occur in about 1%-2% of unmarried women and 3%-4% of married women. The incidence of urinary tract infection in unmarried women is about 1-2%, and in married women is up to 3-4%. Clinically, we often encounter patients who have recurrent episodes of urinary frequency, urinary urgency, and painful urination, and whose condition persists. Patients often say to doctors, “I pay close attention to hygiene and wash my lower body every day, but why am I still so prone to get sick?” So why are women prone to urinary tract infections? This is due to the anatomical and physiological characteristics of women. In normal people, the urethra and urethral orifice have a large number of bacterial parasites, and the bacteria can travel up to the bladder, but the bladder can destroy the bacteria quickly, because the bladder has a role in inhibiting bacterial reproduction, which means that the bladder has a defense mechanism against urinary tract infections. It is believed that this defense mechanism is a mucus “protective layer” covering the mucous membrane of the bladder, which prevents bacteria from coming into direct contact with the bladder mucous membrane, plus the kidneys keep producing urine flow to the bladder, which eventually flushes the bacteria out, so that urinary tract infections are less likely to occur. The urethra of women is only 3-125px long, and straight and wide, the role of the urethral sphincter is weak, the urethral orifice is close to the vagina and anus, in some unfavorable factors and women’s menstruation, pregnancy, sex and other external stimuli bacteria easily along the urethral orifice up to the bladder to cause infection, in addition if there is: ① urinary tract obstruction: such as urethral stricture, stones and neurogenic bladder often due to poor urination, bladder The residual urine increases, thus facilitating the growth and reproduction of bacteria. (2) Vesicoureteral reflux: This means that when the pressure in the bladder is increased, the urine with bacterial growth in the bladder flows backwards along the ureter to the kidneys, leading to pyelonephritis. ③Urethral intubation and instrumentation: Not only can germs be brought into the bladder or upper urinary tract, but mucosal damage can also cause infection. All of these are susceptibility factors and triggers for urinary tract infections. Therefore, women are more susceptible to urinary tract infections than men. No wonder some people call it the “second cold” for women, meaning that urinary tract infections are as common as the flu for women. As the recurrence of urinary tract infection is related to the existence of various unfavorable factors, so we should pay attention to drinking more water and urinating more often, and not only take medication in the treatment, but also address and avoid these unfavorable factors from the root, in order to achieve better results.