Small kidney stones usually have no symptoms and do not cause hydronephrosis, so small kidney stones should be noted to drink more water, balanced diet, more exercise, and regular review ultrasound, as follows: 1. drink more water: prevent further growth of stones by increasing urine volume, facilitate the elimination of stones, and prevent the formation of new small stones; 2. balanced diet: achieve a balance of various substances in the urine to prevent the formation of new stones and the growth of small stones; 3. 3. Exercise more: to promote the discharge of stones through exercise, and also to promote the discharge of stones by using body position, such as lying on the healthy side; 4. Regular review of ultrasound: to observe whether the stones are discharged and whether there are new stones formed.