What is the cause of high urine red blood cell count?

Normal human urine does not contain red blood cells. When the red blood cell count in urine is high, it indicates that there is a hemorrhagic disease. Clinically, many reasons can cause an increase in the number of red blood cells in urine, such as acute bladder inflammation. Due to inflammation, mucosal inflammatory oozing causes an increase in the number of red blood cells in urine. It can also be seen in urinary stones, urinary tumors, and urinary tuberculosis. In addition, it can also be seen in patients with chronic nephritis and nephrotic syndrome. Due to the destruction of glomerular filtration membrane caused by chronic nephritis and nephrotic syndrome, the red blood cells in circulating blood leak into urine, so that the red blood cells in urine are increased, resulting in high clinical examination results of urinary red blood cell count.