Bleeding when urinating is hematuria, and there are many reasons for hematuria, such as glomerulonephritis, ureteral stones, and urinary tract tumors.
1. Chronic glomerulonephritis: patients with glomerulonephritis can be due to the destruction of the glomerular basement membrane, resulting in the leakage of red blood cells through the damaged basement membrane into the urine, resulting in hematuria.
2. Ureteral stones: patients with ureteral stones can have hematuria due to damage to the mucous membrane caused by stone displacement.
3. Tumor of urinary system: patients with tumor of urinary system, such as kidney cancer and bladder cancer, may have hematuria due to rupture and bleeding of blood vessels caused by invasion of cancerous tumor.
There are many other reasons leading to hematuria, so it is recommended that such patients should go to regular hospitals in time to consult doctors, clarify the reasons and deal with them positively, so as to strive for early recovery.