Question

how could a kidney stone cause blood to appear in urine?

Answer 1

Kidney stones are also called as renal calculi, urolithiasis or nephrolithiasis. These are very hard crystalized mineral and salt deposits. There are mainly five types of kidney stones based on their composition. It includes calcium oxalate ( these are the most common forms of kidney stones), uric acid, struvite, calcium phosphate and crystine.

A kidney stones with size less than 5mm will pass through the urine without causing any signs and symptoms. When a kidney stone that is greater than 5mm diameter will moves from kidneys and passed on the ureters, it gets stuck and lodged in the ureters. And the stone will grows in size due to further deposits and blocks the flow of urine. Thus the kidney will swell and spasm occurs in the ureters and can be felt as flank pain. The stones will irritates the lining of the kidneys and the ureters and causes injury to the capillaries and surrounding tissues. This will cause bleeding at the site of stone block and the blood will gets mixed with urine. And the patient with kidney stone voids, he/she may notice blood in urine called as hematuria.

The hematuria that is caused due to kidney stone will resolve itself after the stone is removed.