Sudden confusion (delirium) can have many different causes. Get medical help immediately if someone suddenly becomes confused (delirious).
If a person is confused, they may:
Try asking the person their name, their age and today's date. If they seem unsure or cannot answer you, they probably need medical help.
stay with the person – tell them who you are and where they are, and keep reassuring them
use simple words and short sentences
make a note of any medicines they're taking, if possible
do not ask lots of questions while they're feeling confused
do not stop the person moving around – unless they're in danger
Sudden confusion can be caused by many different things. Do not try to self-diagnose – get medical help if someone suddenly becomes confused or delirious.
Some of the most common causes of sudden confusion include: