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Why kidney stones cause pain—and why pain can stop

Understand obstruction, pressure and stone pain, and why symptom relief does not confirm passage.

Adapted from Stones Unlocked by David Shusterman, MD. Updated October 3, 2026

Original English-language artwork from Stones Unlocked. The explanation below is available in your selected language. Illustrations are educational, not patient scans or predictions of your result.
Why a stone can hurt

The pain is often about the plumbing

A stone in the ureter can interfere with urine draining from the kidney. Pressure, stretching and ureteral activity can produce intense flank pain that moves toward the lower abdomen or groin. Nausea may accompany an episode. The intensity of pain does not reliably tell us the stone’s size, location or the amount of kidney risk.

A quieter day is useful information, not the finish line

Pain can fluctuate as drainage and the stone’s position change. Medication can also reduce symptoms while the stone remains. That is why “I feel better” and “the stone is gone” are different findings. We use your course, recovered-stone information and appropriate imaging to determine what happened.

Make the episode easier to evaluate

Write down when pain began, where it occurs, what medication you took and whether you have seen a stone pass. Do not force large amounts of water to push an acutely obstructing stone through. Fever, chills, uncontrolled pain, persistent vomiting or inability to urinate require urgent assessment. An infected blockage is an emergency; do not wait for an office appointment.

Your next steps

  1. Keep discharge papers and your medication list together.
  2. Arrange follow-up even if pain settles.
  3. Seek urgent assessment for the warning signs above.
Request a stone evaluation

Keep exploring

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Adapted from Stones Unlocked by David Shusterman, MD. Treatment and prevention are individualized.

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