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What are the signs of kidney trouble?

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Signs of kidney trouble include high blood pressure, blood or protein in the urine, more frequent or painful urination, swelling of hands and feet and puffiness around the eyes, according to the National Kidney Foundation. Doctors also perform blood tests to check for falling levels of kidney function.

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Full Answer

People in the early stages of kidney disease often exhibit no symptoms at all, according to WebMD. As kidney trouble worsens, symptoms might also include general nausea and vomiting, loss of appetite, drowsiness, skin darkening and muscle cramps.

Kidney troubles arise when the kidneys have trouble performing the vital job of filtering and returning to the bloodstream about 200 quarts of fluid per 24 hours, according to the National Kidney Foundation.

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