Kidney stones can cause excruciating pain despite their small size. They form from hard, mineral and salt deposits in the kidneys. Hydration, diet, and certain medical conditions can affect the risk of developing kidney stones.

A board-certified physician, Dr. Rhea Rogers, explains that kidney stones block small tubes in the body, leading to severe pain. A gerontologist, Sam Cradduck, who has had four kidney stones, describes the pain as similar to putting a jagged stone through a straw.

Further information on what causes kidney stones and how to lower the risk is available, including insights from Dr. Rogers and Cradduck's personal experience.