Chronic Nephritis  is a series of pathological changes, mainly caused by renal ischemia and anoxia of the kidney whose inherent cells have been damaged. There are five types of Chronic Nephritis:

　1. Onset as Acute Glomerulonephritis, not completely controlled,  with clinical symptoms such as proteinuria and edema lasting more than one year, and then transforming into Chronic Nephritis.

　2. Having acute nephritis by clinical history, and after weeks or months of treatment, clinical symptoms and abnormal urine disappear, and renal function returns to normal. After remaining asymptomatic for a long interval of time (lasting up to several years), the patient develops an upper respiratory tract infection or other infection, or with severe fatigue, the nephritis symptoms of proteinuria, edema or (and) hypertension recur.

　3. No previous nephritis history, then developing an acute respiratory tract infection or other infections, symptoms of Nephrotic Syndrome like severe edema or large amounts of proteinuria develop.

　4. No previous nephritis history, the patient develops short-term proteinuria, progressive hypertension and renal insufficiency.

　5. No previous nephritis history, the patient develops hematuria (blood in the urine) and (or) proteinuria after an acute infection or fatigue, which diminishes or disappears after a short intervals.  Repeated attacks, without obvious clinical symptoms.