I occasionally have a dull ache in my kidneys. It happens most after I drink a good amount of water, especially on an empty stomach or after a bowel movement. I have had an overactive bladder for about 20 years. I ve been checked multiple times for prostate issues, but everything with my prostate has checked out normal. At times, I lose bladder control. Could the trying to hold back the pee be causing pressure on my kidneys??