Early warning signs of kidney disease may include changes in urination patterns, such as increased frequency or decreased urine output, presence of blood in the urine, and swelling or puffiness in the hands, feet, or face due to fluid retention. These symptoms can be caused by various kidney conditions, and it is important to consult a healthcare professional for proper evaluation and diagnosis. Other potential signs of kidney disease include fatigue, difficulty concentrating, decreased appetite, and muscle cramps. Regular check-ups and monitoring of kidney function are crucial, especially if you have risk factors for kidney disease.