Hi. . In general kidney stones less than 5 mm don't need any removal treatment. Best is to prevent it from becoming bigger n one day it will hopefully get out uneventfully with ur urine. How to prevent a stone from becoming bigger? 1. Best way according to studies is to drink 3 lt per day at REGULAR Intervals , so that ur urine output is 2 lt per day. 2. Take lot of citrus fruits containing citrate... Best r oranges, then lemon n pineapple 3. Non veg restriction esp meat to 2 3 times a day 4 salt restriction 5 urinary alkalizer 15 ml 2 to 3 times a day dissolved in water.... Mostly if u r recurrent stone former