Hemoglobinuria is symptom of different blood conditions or problems with the kidney (an organ in the abdomen which filters blood and produces urine). Hemoglobin is a chemical found in the blood cells and its function is to carry oxygen from the lungs to the rest of the body. Hemoglobinuria is when this chemical is inappropriately found in the urine (usually, there is no hemoglobin present in urine). This may occur due to the destruction of red blood cells and leaking of hemoglobin into the bloodstream, which then passes into urine. Other causes include severe skin burns, kidney cancer, malaria, and reactions to blood transfusions. Symptoms and treatment vary depending upon the condition and symptoms of patient.