Most chronic UTIs are caused by untreated or incompletely treated acute UTIs. Chronic UTIs are more difficult to treat than acute UTIs, and the course of medication is usually extended exponentially. Since a portion of chronic UTIs are repeatedly medicated, there is a possibility of drug-resistant bacterial infections. In addition, some external factors such as urethral injury, intraurethral foreign body, urethral obstruction, inflammation spread, unclean sex and bad habits can also cause chronic urethritis. 1, urethral injury: urethral examination, indwelling catheterization, urethral stent, etc. will destroy the urethral mucosa defense function, resulting in bacterial infection, which may cause chronic urethritis; 2, intraurethral foreign body: the artificially placed urethral foreign body, or urethral If not treated in time, it can lead to chronic urethritis; 3, urethral obstruction: such as circumcision, urethral stenosis, urethral stricture, urethral tumor, urethral hymen fusion, etc., can lead to poor urination, so that urine accumulates in the urethra secondary to urethral infection, causing chronic urethritis; 4, the spread of inflammation: such as prostatitis, vaginitis and other inflammatory diseases spread to the urethra, can cause chronic The UTI can be caused by the spread of inflammatory diseases such as prostatitis and vaginitis to the urethra; 5, unclean sexual life: such as young women have frequent sexual life, multiple sexual partners, etc. also prone to urethral infections, increasing the chances of chronic UTI; 6, bad habits: such as alcohol stimulation, spicy diet, drinking less water, holding urine, etc. can also cause chronic UTI; 7, other: if older women have a history of urinary tract infections before menopause, combined with urinary incontinence, bladder bulge, residual The most important thing is that you should be able to get a good idea of what you are doing. In addition, if patients themselves have renal insufficiency, organ transplantation, immune deficiency, diabetes, or perioperative or postoperative combined urinary tract infections, as well as radiation therapy, chemotherapy damage to the urinary tract epithelium, etc., can also lead to UTIs that do not easily heal and gradually turn into chronic UTIs.