The possible causes of blood in the male urethra: 1, urethritis, urethral inflammation can lead to urethral erosion, bleeding, in the process of urination or with the urethral secretions out of the body, accompanied by frequent urination, urinary urgency, pain in the urethra, need to carry out urine laboratory tests to exclude the presence of inflammation. 2, urethral stones, stones in the male urethra, can cause local mucous membrane breakage, bleeding, can be manifested as hematuria or urethral bleeding. This can be manifested as hematuria or bleeding from the urethra. It can also be accompanied by obstruction of urination, with symptoms such as straining to urinate, bifurcation of urination or difficulty in urination. 3, tumors of the urethra or tumors of the bladder neck can lead to local mucosal rupture and bleeding, which can be accompanied by fresh blood dripping from the urethra and obstruction of urination. 4, trauma to the urethra, such as The mucous membrane can be broken and bleeding can be caused by straddling injuries or violent blows to the urethra. In particular, straddling injuries can lead to contusions or fractures of the urethral bulb, which can cause blood to drip from the urethra, often with a clear history of injury.