Diseases like diabetes, high blood pressure and chronic kidney infections cause kidney damage over the course of many years. In many cases, the better you can control blood sugar and blood pressure, the less damaging these diseases are to the kidneys. Unfortunately though, once the damage occurs, it usually cannot be reversed.
Some people have an injury that causes kidney damage, or they may have been born with a defect in the urinary or kidney system, or they may have a hereditary defect such as Polycystic Kidney Disease. There are many types of kidney disease and we know that even some drugs taken for other conditions can cause kidney damage.
Unfortunately, in some cases the exact cause of kidney disease cannot be found.