Dr Milind Bapat | Urologist | Kidney Doctor | Kidney Treatment | Kidney Specialist | Andrologist | Pune Kidney failure is a condition in which the kidneys are unable to properly filter out waste and excess fluid from your blood. Symptoms of kidney failure can include: Feeling tired Feeling weak Swelling in your feet, legs, or ankles (edema) Reduced urine output Difficulty concentrating Nausea Shortness of breath In the most severe cases, kidney failure may cause complications such as: High blood pressure Electrolyte imbalance Anemia Lack of fluid in your lungs Dialysis to filter your blood or a kidney transplant Early detection and treatment of underlying conditions can help prevent complications and improve outcomes.