If you have stinging pain in the urethra and blood in the urine, it is recommended to go to the hospital for further examination to clarify the possible causes. 1, acute urethritis, which can cause stinging pain in the urethra with mucosal rupture and bleeding, and can be accompanied by increased frequency of urination or increased discharge from the urethra. It is necessary to go to the hospital for further urine routine or smear examination of secretions to confirm the diagnosis. 2, urethral stones, stones obstructing the urethra, can cause a continuous stinging sensation, the pain can be aggravated when urinating, and can be accompanied by the phenomenon of blood dripping from the urethra, and may be accompanied by poor urination, urinary effort or bifurcation of urination and other phenomena. It is recommended to go to the hospital for further urological ultrasound or urethroscopy to confirm the diagnosis.3. Urethral tumors or polyps can cause persistent stinging pain in the urethra with blockage of urination and can be accompanied by symptoms such as hematuria or bleeding from the urethra, which requires urethroscopy to clarify the presence of the above lesions.4. Urethral trauma, such as urethral straddling injuries or pelvic fractures combined with injuries to the posterior urethra, can occur. It can appear to have urethral stinging pain and blood in urine or with difficulty in urination, etc., generally have a clear traumatic experience.