Stabbing pain when urinating is most commonly associated with infections of the urinary system, most commonly acute cystitis in female patients. Because the urethra of female patients is very close to the vagina and anus, it is easily contaminated by the anus and vagina, especially the anus, which can lead to the entry of Escherichia coli into the urethra, which can lead to the occurrence of acute cystitis in female patients. In addition to frequent, urgent and painful urination, there will be a burning sensation when urinating, sometimes there will be blood in the flesh at the end of urination, and the bladder area will be distended and painful. If this set of symptoms occurs, a routine urinalysis is needed. If the white blood cell count increases in the urine routine, it is considered to be an infection of the urinary system, you can take levofloxacin orally for three days, drink more water, urinate more, eat less spicy and stimulating food, and keep drinking more than 2,000 ml of water per day.