Urinary tract stones are caused by a hard deposit of minerals, acid and salt that clump together in the urine. In normal cases, the stones are small and can pass through the urinary tract unnoticed. The problem usually occurs when the stones become too large causing them to block the route where urine needs to pass.
Over time, stones can develop and even grow larger as they go through the bladder, urinary tract and ureter. More often than not, stones can cause no symptoms but when there are symptoms, patients may feel severe pain in the back, ribs, hip, and abdomen. [16]