My wife was operated for removal of right lower ureteric calculi (8.5 mm) on 26/10/2007 by eswl therapy. And she was ok. Again after gap of 10.5 years, on 24/04/18 (present age 67 years), she complained about pain due to left lower ureteric calculi (7 mm) problem, though she was not operated but hydro therapy was applied. Still calculi (around 3 mm, after hydro therapy) is within body, is it harmful? Also whether her body has become calculi generator (though after 10.5 years) or it is natural process of calculi getting formatted inside body? On its own?