My son has been complaining on and off for about 6 months of left lower side pain that radiates to his back..I have been to his Dr and was told that it was constipation. Take it as it comes, however Cade is on Miralax and goes regularly. Now this past month we have been to the ER twice because he is in agonizing pain and screams at the top of his lungs that it hurts and nothing I do relieves the pain. 1st ER visit I was told that it was constipation, 2nd ER visit showed enlarged left kidner(which he has had since birth). I went to his kidney specialist who did three different tests and now he says that he does have a larger left kidney, however there is no reason for him to believe that the problem can be caused by this. Any one have a similar issue, I am kind of out of ideas as to what it could be. I just know that I wasnt to get to the bottom of the issues because I never want to go through this again!!