Having a kidney failure is one of the worst diseases a person would have, finding a kidney that matches for transplant is not the end of the story, after that the patient would take immuno-suppressant medicine for the rest of their lives. Living with a weak immune system also opens the door for other diseases, cancer one of them.
I am sorry if I scared you but this is to show how important it is to detect any kidney disease in the early stages so that it can be dealt with, and avoid the worst. If you feel that your kidneys may be in danger because of a condition you have like hypertension or diabetes, drinking a gallon or more of water daily is great to keep your kidneys in good condition. Follow the link below to learn how you can detect kidney problems.