Question: what are the symptoms of high urea levels?
Answer: A cluster of symptoms called uremic neuropathy or nerve damage due to kidney failure. ... 
Weakness, exhaustion, and confusion. ... 
Nausea, vomiting, and loss of appetite. ... 
Changes in blood tests. ... 
People with uremia may also show signs of metabolic acidosis where the body produces too much acid.
High blood pressure.