Symptoms of chronic kidney disease vary as per the severity of the disease. During the early phase, there may be no warning symptoms. But early clues may be nocturia, elevated blood pressure, urine abnormalities and normal or slightly higher serum creatinine. Common early symptoms of kidney diseases are swelling, loss of appetite, nausea, weakness, severe or uncontrolled hypertension and pallor. Advanced stage or end stage kidney failure patients are usually symptomatic. Some patients may not have symptoms and the problem may go undetected until the kidneys are severely damaged. Common problems at this advanced stage are severe nausea, vomiting, weakness, breathlessness, pallor, confusion, altered sensorium and convulsion.