Glomerulonephritis (GN) is the name given to various conditions that develop when the kidney’s glomeruli become inflamed. This inflammation limits their ability to filter and remove excess fluids from the blood and pass them into the urine. Kidney failure can occur if the glomeruli are damaged by this inflammation. GN type is distinguished by onset speed; acute (severe and sudden in onset) or chronic (long-developing). GN can occur independently (as primary GN) or as a feature of another disease (as secondary GN).