Natural discharge of 1 cm stones can affect the ureter

If the stone is smooth and round, it will not affect the ureter greatly when it is naturally discharged. However, if the stone is irregular in shape or not smooth in surface, and there are sharp edges, it may scratch the ureteral mucosa when it is naturally discharged, causing urinary tract infection. Secondly, it may be stuck in the narrow part of the ureter, resulting in ureteral obstruction and hydronephrosis, affecting the health of the patient.