CRF, or Chronic Renal Failure, is a medical condition where the kidneys gradually lose their ability to function properly. This can lead to a buildup of waste products in the body, causing various health issues. Common causes of CRF include diabetes, high blood pressure, and glomerulonephritis. Symptoms of CRF may include fatigue, swelling in the legs, and changes in urination patterns. Treatment options often involve managing the underlying causes, dietary changes, and in severe cases, dialysis or a kidney transplant may be necessary to maintain health and quality of life.