The main question as to which disease is more serious, ureteral stones or kidney stones, is which disease causes more serious complications. Ureteral stones tend to cause renal colic and can also lead to hydronephrosis, which is more likely to cause secondary urinary tract infections and kidney function damage. Therefore, in cases of equal size in diameter, ureteral stones are more serious than kidney stones and need to be treated promptly and not wait for observation. If the kidney stone is larger in size than the ureteral stone and has formed a long and slow inflammatory irritation in the kidney, it is more serious at this time. This is because the stones, if they keep increasing in size, can form cast stones, which can lead to kidney function damage. Therefore, patients with ureteral stones and kidney stones should be treated actively, and at the same time, if the stones are large, lithotripsy is needed to cure the disease completely.