The occurrence of urinary tract infections is mostly related to the following factors. 1, external genitalia is not hygienic, clinical can be seen in women, such as long time do not change underwear, drink too little water or have a period do not pay attention to health care, can induce urinary tract infections. 2, the body’s immunity declined, when the body’s immunity declined, also easy to get urinary tract infections. 3, drink too little water or long excessive urine holding, drink too little water, urine concentration, urine in the normal urinary tract will stimulate the urinary tract, bladder mucosa uroepithelial congestion can induce urinary tract infections.