In most cases, kidney failure is caused by many types of health issues that have done permanent harm to kidneys very short time, over time. When your kidneys are damaged, they will not work similarly as they must.
If the harm to your kidneys continues to induce worse and your kidneys are less and fewer able to do their job, you have got chronic kidney disease.
Kidney failure is that the last (most severe) stage of chronic nephropathy.
This is why kidney failure|renal disorder|nephropathy|nephrosis|failure} is additionally known as end-stage urinary organ disease, or ESRD for brief.