So much pain that you can no longer sit still: what are kidney stones, and how do they form?

Kidney stones are more common than you might think. Nearly 180,000 people walk around with it, although not everyone has complaints. Severe pain is by far the best-known signal. How exactly do kidney stones form, and what can be done about them? Urologist Hans Broos explains: “It can be very bad. I see patients here in the hospital who even have to vomit from the pain.”

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