This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Your patient becomes restless and tells you she has a headache and feels nauseous during hemodialysis. Which complication do you suspect? 
Select and explain. 
A. Infection, B. Disequilibrium syndrome, C. Air embolism, D. Acute hemolysis
B: Disequilibrium syndrome
Answer: B: Disequilibrium syndrome 
Explanation: Disequilibrium syndrome is caused by a rapid reduction in urea, sodium, and other solutes from the blood. 
This can lead to cerebral edema and increased intracranial pressure (ICP). Signs and symptoms include a headache, nausea, restlessness, vomiting, confusion, twitching, and seizures.