Kidney stone cases are on the rise, particularly in hotter climates where dehydration is more common. These small, crystal-like deposits form when minerals such as calcium, oxalate, or uric acid accumulate and crystallize in the kidneys. A widespread belief suggests that drinking 10–12 glasses of water a day can help flush out kidney stones—but how accurate is this claim?

Dr Amit Saple, senior consultant urologist and executive director at AINU Hospitals, Visakhapatnam, explained the role of hydration in kidney health. “Water keeps your urine diluted, so those stone-forming particles don’t get a chance to stick together,” he said, highlighting that proper hydration is one of the most effective ways to prevent kidney stones from forming in the first place.

However, Dr Saple clarified that water is not a magic solution for dissolving existing stones. Only very small stones—typically under 5 mm—can pass naturally with the help of increased urine output. “Drinking more water can help push tiny stones out, but it does not break down or melt them,” he emphasized. Larger stones usually require medical intervention.

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For stones over 6–7 mm, simply drinking water is insufficient. Patients experiencing severe pain, infections, or urinary blockages need prompt medical attention. Treatments may include prescription medications, shock wave therapy, or minor surgical procedures. Ignoring these warning signs can lead to serious complications, including kidney damage.

Regarding hydration, Dr Saple recommends a baseline of 10–12 glasses of water daily, aiming to produce at least two to two-and-a-half liters of urine per day. Monitoring urine color—keeping it clear or pale yellow—is a practical way to gauge adequate hydration. He also advised limiting salt, moderating foods high in oxalates like spinach and nuts, and maintaining balanced calcium intake.

In conclusion, while water is an essential first line of defense against kidney stones, it is not the entire solution. “Water helps prevent stones and can aid in passing very small ones,” Dr Saple said. “But for larger stones or complications, professional medical care is essential.”

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