My older daughter had urinary reflux, diagnosed at the age of 4. She used to get recurring urinary tract infections because of it. They finally had to put her on antibiotics permanently to prevent the UTI's. They were almost positive that she would eventually have surgery, but AMAZINGLY, we went for follow up testing (the awful kind where they shoot the dye through the catheter) and she was fine. The doctors were very surprised but also very pleased, as was I. She was able to stop taking the antibiotics and we haven't had any issues in over 3 years. So it IS possible for the problem to clear up without surgical intervention, but I have no idea what the statistical likelihood of that happening is.
Good luck, I hope everything turns out okay with your child.
at 1:18 PM on Dec. 19, 2010