My son was born with hydronephrosis. He is 4 now. He has not had any infections, yet, but he has dark yellow and cloudy urine, has a strong smell, has some pain on the right bakside, and sometimes he grunts to pee and he says it hurts. The doctors keep saying he'll grow out of it. Will he? Should I get 2nd opinion? what happens if he doesn't? Thanks-worried mom in louisiana.