Blood in urine from kidney stones is due to the rough surface of kidney stones, which causes damage to the epithelium of the urinary tract during movement, rupture of capillaries, and outflow of red blood cells from the vessels into the urine to form hematuria. Blood in urine is a more prominent symptom of kidney stones, which mostly occurs after renal colic. The kidney stone needs to pass through the ureter when it is discharged downward with the urine. Because the surface of the stone is not smooth, it will scratch the ureteral mucosa during the process of ureteral migration, causing the ureteral mucosa to bleed. The clinical term for blood in urine is called carnal hematuria. The light red color, or a slight type of hematuria like meat wash, indicates that the amount of blood in urine is more than 1ml per liter. The management of blood in urine depends on the color, nature and severity of the hematuria. The flesh-water type of hematuria can usually be relieved by drinking more water. You should drink more water so that the daily urine volume can be maintained at 2000-3000ml, and more urination can effectively dilute the color of urine; if the flesh-water hematuria is blood-like, or dark red and sticky with a large number of blood clots, it is relatively serious, and the patient should visit the urology department of a regular hospital and take appropriate hemostatic drugs under the guidance of a doctor to control the symptoms of hematuria. At the same time, kidney stone hematuria needs to be treated with antibiotics to prevent infection. After finding blood in urine, patients should further check the stone situation and undergo targeted stone removal or stone extraction treatment, because only by expelling stones can the hematuria be effectively relieved.