Possible causes of urethral bleeding in men: 1. Prostatic hyperplasia, when prostatic hyperplasia occurs, the gland enlarges and protrudes into the bladder cavity and the posterior urethra. The vascular varices on the surface of the gland can rupture and bleed, and the bleeding often manifests itself as fleshly hematuria throughout, usually without the symptoms of painful urination. It is recommended to perform ultrasound or urethroscopy of the prostate to confirm the diagnosis. 2, urinary system infection, especially in acute cystitis, urethritis, can be accompanied by carnal hematuria, accompanied by urinary frequency, urinary urgency, painful urination and other symptoms of urinary tract irritation, routine urine examination can confirm the diagnosis. 3, trauma to the urethra, such as high falls riding across injuries, percussion injuries, etc., can appear urethral The situation of blood dripping. The blood drips from the urethral orifice and can be mixed with the urine to show bleeding, and the patient usually has a clear history of trauma. 4. Generally there is no obvious pain, but there may be back pain, abdominal pain, etc. With the increase of tumor volume, the more severe the symptoms. Further ultrasound or CT examination of the urinary system is recommended to rule it out.