Most sediment-like stones are asymptomatic, and a few people can develop pain and hematuria as a condition. Generally, sediment-like stones are very small, about 1-2 mm for large ones and even smaller for small ones, and basically do not cause symptoms of obstruction. Most of them are formed in the renal pelvis, and multiple sediment-like stones will enter the ureter with urine. Generally, sediment-like stones are relatively small, 1-2 mm, and will not cause ureteral obstruction and will not be painful. In some cases, ureteral stenosis or other reasons, there is a transient obstruction of the ureter or the stone is blocked in a certain place, which will cause renal colic, manifested as pain in the lower back and abdomen, manifested as hematuria or elevated red blood cell count in the urine. You can check the uric acid in blood and parathyroid gland to see if there are any endocrine factors to prevent stone recurrence.