Urinary tract infection, some patients will have a discharge, this situation is mainly seen in the infection of the urethra, that is, various types of urethritis, can cause an increase in secretions, such as gonococcal infection caused by urethritis, there can be a large amount of yellow pus secretions from the urethra. Urethritis caused by mycoplasma and chlamydia can result in a thick, thin, purulent discharge from the urethra. Non-specific urethritis can also present with a small amount of purulent discharge, which is usually accompanied by symptoms of urinary frequency, urgency, and painful urination. Infections of the upper urinary tract, such as pyelonephritis or ureteral infections or perinephric infections, rarely show urethral discharge. Acute cystitis also rarely have urethral discharge, unless acute cystitis combined with urethritis, then there can be urethral discharge, the treatment needs to be retained urine culture and secretion culture to clarify the specific infectious bacteria, targeted selection of drugs for treatment.