Recognizing early warning signs of kidney dysfunction is vital for maintaining long-term health and preventing severe complications. Key symptoms to watch for include persistent fatigue and weakness due to decreased red blood cell production, sleep disturbances caused by poor oxygenation, and unexplained skin dryness or itching resulting from mineral imbalances. Physical signs such as puffiness around the eyes from protein loss, swelling in the feet or ankles, and changes in urinary habits—like increased nighttime urination or foamy urine—are also significant indicators. Additionally, a metallic taste in the mouth, muscle cramps, and loss of appetite can signal a buildup of toxins that the kidneys are failing to filter. If you experience multiple symptoms from this list consistently, it is highly recommended to undergo a renal function test (RFT) or an ultrasound to evaluate your kidney health and ensure timely medical intervention.