Urinary stones 0.4cm can be helped to be discharged by drinking more water, exercising more, and using lithotripsy drugs, and lithotripsy is generally not needed, and lithotripsy is also not recommended for gallstones. Urinary stones 0.4cm, due to the smaller stones, you can drink more water, more exercise, you can also use lithotripsy granules and other drugs to help discharge the stones, generally do not need to carry out lithotripsy, if the stones for a long time is not discharged, the emergence of obvious symptoms, you can consider extracorporeal lithotripsy. Gallstones of 0.4cm are not recommended to be crushed, after the discharge of the crushed stone may cause acute cholangitis or acute pancreatitis, gallstones can be dissolved by taking ursodeoxycholic acid or surgical removal of stones. Drink plenty of water and do more exercise to help the stones to be discharged, and follow your doctor’s instructions for medication.