what are the 3 early warning signs of kidney disease?
['Waking up at night to urinate (called nocturia)', 'Urinating more frequently than usual.', 'Urine that is foamy or bubbly.', 'Urinating less often, or in smaller amounts than usual with dark colored urine.', 'Blood in the urine.', 'A feeling of pressure while urinating.', 'Difficulty urinating.']