Watch for symptoms such as changes in urination, including increased frequency at night or a noticeable decrease overall, foamy urine, persistent fatigue, swelling in the legs, feet, or abdomen, and ongoing back pain. Other warning signs may include unexplained weight loss, a lack of appetite, nausea, trouble sleeping, a metallic taste in the mouth, muscle cramps, and itchy skin, as these could indicate potential kidney issues. To protect your kidney health, make sure to stay well-hydrated, limit your intake of processed foods and salt, manage conditions such as diabetes and high blood pressure, and avoid excessive use of medications. If you experience any of these symptoms, consult a doctor promptly for testing and early intervention to maintain healthy kidney function.