4. Nausea
Healthy kidneys also take on the role of the body's personal trash process; that is, they're responsible for getting rid of waste in the body.
In the event of kidney problems or failure, waste won't exit the body as efficiently as before, causing a buildup of excess waste in the bloodstream.
This is known as uremia, and it can cause feelings of nausea or make you need to vomit. It should go without saying that your body doesn't like being filled with waste, and it attempts to purge the waste by way of vomiting.