question: For the last few days my lower back, on both sides has been aching. It seems to be in the kidney areas. Is it common for both kidneys to ache at the same time? No other symptoms. I have increased my water consumption and my urine is clear now. The aching has eased up a bit but still noticable, especially when getting out of bed, or off the floor from sitting. I am female and 56 years old. 155 lbs.I have been doing some lifting lately...