Urethral bleeding is hematuria. It is not recommended to take medication to stop the bleeding as it may mask the condition. Hematuria is a symptom, not a separate disease, and it can occur at different ages. At the same time, hematuria is also a signal that the body may have an abnormality that needs to be dealt with. Pediatric hematuria is commonly caused by nephritis, stones, congenital malformations of the urinary system, infections, nutcracker syndrome, etc.; adult hematuria is mostly due to urinary stones, urinary tract tuberculosis, urinary tract infections, prostate hyperplasia, urinary tract tumors or some renal diseases and coagulation abnormalities diseases; older patients hematuria is difficult to specify the cause of the cause when the need to be vigilant against malignant tumors may be. There are many causes of hematuria, and taking antiemetic drugs may cover up the condition, which is unfavorable for further diagnosis and treatment. Hematuria, should actively seek medical attention, clear diagnosis after the use of drugs, do not unauthorized use of antiemetic drugs.