The phenomenon of stinging and pus in urine is definitely abnormal. Under normal circumstances, urination does not sting and the urethra is smooth and clean, without pain or itching. In pathological cases, pus may occur, such as gonorrhea, urethritis, glansitis, bladder or urethral tumors, and other diseases that can cause this condition. In both men and women, there is occasionally a small amount of clear discharge from the urethra under normal circumstances, but it is not purulent, and this series of pathological changes occurs when there is a disease of the genitourinary system. The most common symptom of stinging pus in the urine is infection with gonorrhea, a sexually transmitted disease caused by infection with gonococcus-like bacteria, of which humans are the only hosts. The infection destroys the mucosal tissue of the urethra, causing a series of symptoms such as pus flowing from the urethra and stinging pain when urinating. In more severe cases, urethritis and glansitis can also cause pus and stinging pain in the urethra, but to distinguish them from gonorrhea, you can go to the hospital for a gonococcal smear test to confirm the diagnosis. If there is a tumor in the bladder or urethra, stinging pain and pus in the urine will also occur as the tumor grows. It is important to go to the hospital in time for treatment. The earlier the treatment, the better the result.