Kidney Failure can be caused by:
1. Kidney Infections – can cause inflammation of kidneys which can damage the cells. This interferes with filtering in renal capsules or with reabsorption in other parts of the nephron.
2. High B.P can damage glomeruli. Blood in glomeruli is already under high pressure but capillaries can be damaged if blood pressure gets too high. Hence, larger molecules like proteins can get through capillary walls and into urine.