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How to pass a kidney stone
Understand that some stones are easier to pass naturally than others.
How readily a stone responds to home treatment mostly depends on the size of the stone.
Home treatments are usually effective on stones less than 1/10-inch (3 mm).
Once kidney stones reach about 3/10-inch (8 mm), they are only 20 percent likely to pass on their own with home treatment. Stones that are 2/5-inch (1 cm) almost always need professional medical treatment.