Hi doctors.my age is 20.i had stones in both kidneys.2 in left and 1 in right.in left kidney stone is in the tube.i had surgery last 3 days back.and doctor placed a stent in tube.and another 1 stone is in the kidney only.doctor said it will be dropped through the stent by drinking more water only.is he correct or any other precautions i should follow..before surgey 0.9mm-1.0cm stone is inside the tube and is removed .and now 8-9mm stone in the kidney and i have stent along the tube