23 Warning Signs Your Kidneys May Be Asking for Help Your kidneys are two bean-shaped organs that work quietly every day to keep your body in balance. They filter waste and excess fluid from your blood, help regulate blood pressure and electrolytes, and produce hormones that support red blood cell production. When kidney function is impaired, the warning signs can sometimes be subtle—especially in the early stages. Recognizing possible symptoms and getting appropriate medical evaluation can help identify kidney problems early and reduce the risk of complications. Here are 23 signs that may be associated with kidney problems: 1. Constant Fatigue Reduced kidney function can contribute to anemia because the kidneys produce erythropoietin, a hormone that helps stimulate red blood cell production. Anemia may cause tiredness, weakness, and reduced energy. 2. Trouble Sleeping People with kidney disease may experience sleep problems. Changes in body chemistry, itching, muscle discomfort, or conditions such as sleep apnea can contribute to disturbed sleep. 3. Dry or Itchy Skin Advanced kidney disease can cause dry, itchy skin. Changes in mineral and phosphorus balance may contribute to persistent itching. 4. Frequent Nighttime Urination Waking up frequently to urinate, known as nocturia, can occur with kidney disease. However, it can also have many other causes, including an enlarged prostate, diabetes, or urinary tract problems. 5. Foamy Urine Persistent or unusually foamy urine can sometimes indicate excess protein in the urine (proteinuria), which may be a sign of kidney damage. 6. Swelling in the Ankles, Feet, or Hands When the kidneys have difficulty removing excess sodium and fluid, fluid can accumulate in the body and cause swelling (edema), particularly in the legs, ankles, feet, or hands. 7. Puffy Eyes Swelling around the eyes, especially in the morning, can sometimes occur when significant amounts of protein are being lost through the urine. 8. High Blood Pressure The kidneys play an important role in regulating blood pressure. Kidney disease can contribute to high blood pressure, while long-term high blood pressure can also damage the kidneys. 9. Shortness of Breath Kidney disease can sometimes cause shortness of breath because of fluid accumulation or anemia. Shortness of breath can have many other causes and should be medically evaluated when persistent or severe. 10. Metallic Taste in the Mouth Advanced kidney disease can cause a metallic or altered taste because waste products accumulate in the blood. This may also contribute to unpleasant breath. 11. Loss of Appetite A buildup of waste products in advanced kidney disease can cause nausea, changes in taste, and reduced appetite. 12. Muscle Cramps Changes in electrolyte and mineral levels associated with kidney disease can contribute to muscle cramps, spasms, or discomfort. 13. Difficulty Concentrating Advanced kidney disease can cause difficulty concentrating, mental fog, or problems with memory. Anemia and the accumulation of waste products may contribute to these symptoms. 14. Feeling Cold All the Time Anemia associated with kidney disease can make some people feel unusually cold, particularly in the hands and feet. 15. Back or Side Pain Pain in the back or side can occur with kidney stones or kidney infections. However, chronic kidney disease itself often does not cause pain, so persistent pain should be evaluated to determine its cause. 16. Changes in Skin Color In advanced kidney disease, changes in skin color or complexion can occur. Pale, grayish, or yellowish skin may have many possible causes and is not specific to kidney disease. 17. Persistent Itching Persistent itching, particularly when widespread and without an obvious skin cause, can occur in advanced kidney disease because of changes in mineral balance and the accumulation of waste products. 18. Unexplained Weight Loss Unintentional weight loss can occur with serious or advanced illness, including kidney disease, particularly when nausea and loss of appetite are present. It should always be evaluated by a healthcare professional. 19. Nausea and Vomiting Nausea and vomiting can occur when kidney function becomes severely impaired and waste products accumulate in the bloodstream. 20. Bad Breath Advanced kidney disease can cause a distinctive ammonia-like or urine-like odor to the breath because of elevated urea levels. 21. Decreased Urine Output A significant decrease in urine production can occur with acute kidney injury or severe kidney dysfunction. A sudden reduction in urine output requires prompt medical assessment. 22. Dark or Bloody Urine Blood in the urine can make it appear pink, red, or cola-colored. Dark urine can have many causes, including dehydration, medications, foods, muscle injury, kidney stones, or liver problems. Visible blood in the urine should be evaluated by a healthcare professional. 23. Bloating or Swollen Abdomen Severe fluid retention can cause abdominal swelling or a feeling of bloating. However, abdominal swelling has many possible causes and does not necessarily indicate kidney disease. How to Protect Your Kidneys If you notice persistent or concerning symptoms, don’t ignore them. Early evaluation is important, particularly if you have diabetes, high blood pressure, a family history of kidney disease, or other risk factors. Ways to support kidney health include: Stay adequately hydrated, unless a healthcare professional has advised you to restrict fluids. Follow a balanced diet and limit excessive sodium intake. Keep blood pressure and blood sugar under control. Avoid unnecessary or excessive use of NSAID pain relievers such as ibuprofen and naproxen. Take prescribed medications as directed. Get regular health checkups and appropriate kidney-function testing when recommended. When to Seek Urgent Medical Care Seek prompt medical attention for symptoms such as sudden severe reduction in urine output, visible blood in the urine, severe shortness of breath, chest pain, confusion, or severe swelling. Conclusion Kidney disease can develop without obvious symptoms, particularly in its early stages. These 23 signs can have many different causes, so experiencing one or more of them does not automatically mean you have kidney disease. If symptoms persist, worsen, or occur alongside risk factors for kidney disease, speak with a healthcare professional. Simple blood and urine tests can help assess kidney function and identify problems that may require treatment.

EditoronAugust 13, 2026