What does a kidney stone feel like? Hopefully you never have to find out, because the pain can be severe. While most stones are typically petite, passing them can lead to some real suffering. In this video, urologist Dr. Bob Berookhim explores the ways that these spiny intruders form, how to know if you have one, and what to do to fix them. Most importantly, he lays out how attention to your diet and water intake can help prevent a painful kidney stone passage.