It varies. Some people remember nothing about an episode of delirium. Others remember fragments, or remember frightening scenes very clearly.
Families usually hope they forget it all, and often that is what happens. Days pass in a blur and afterwards there is a gap.
But many people are left with some memory of it, and it is usually not the ordinary ward routine. It is the frightening parts. Being held down for a blood test they did not understand. Believing the staff meant them harm. Seeing someone in the corner of the room. Being certain they had to get home, and being stopped. Those memories can feel more real afterwards than the things that actually happened, because at the time they felt real.
When the memories cause lasting distress
Frightening memories of delirium can leave people anxious, low, or unwilling to go back into hospital. After intensive care in particular, the effects can look like those of any other frightening experience. This happens more often than most families are told.
What helps
Allow time to talk without pressure. Listen to what the person remembers and how it felt. Some memories may reflect experiences during delirium; others may concern events that really happened. If they describe harm, take the account seriously and ask the clinical team to look into it.
You might say: “That sounds frightening. Tell me what you remember, if you want to. We can ask the team to help explain what happened.”
Then let them tell you as much or as little as they want, more than once if they need to.
It also helps to fill in the gaps for them: what day they came in, what was wrong, what was done, and how long it went on. Families can often help to supply that, and having a clear account of what actually happened takes some of the fear out of the fragments.
When to speak to a doctor
If someone is still distressed by the memories weeks later, speak to their usual doctor. Signs include avoiding reminders, sleeping badly or having memories that feel as though the event is happening again. This can be treated, and it is not something to wait out.
When to get help
Delirium (acute confusion) is a medical emergency. Outside a care setting, call local emergency services now. In a hospital, care home or nursing home, tell staff immediately. Say what has changed and ask whether it could be delirium.