tissues are divided into 2 portions ,renal vascular part and renal parenchymal part. Renal parenchymal disease refers to the damage that occurs in renal parenchyma.
There are millions of nephrons exist in the renal parenchymal area of each kidney. Nephrons are consisted of glomeruli--small blood vessels and tubules, which filters the blood throughout the body. Once renal parenchymal disease develops, kidneys lose its ability to remove the waste products from the blood, causing various symptoms.
There are many causes for it like uncontrolled diabetes
,high blood pressure
If renal parenchymal disease is not treated early,it may develop into advanced stage and result in kidney failure.
So consult your doctor,get yourself investigated completely and start the treatment to avoid future kidney complications.Since your problem is in early stage,a proper management can make you all right.