All day, they’re mostly themselves. Then around four or five in the afternoon, something shifts. They get restless. Anxious. They want to go home — even though they’re already home. They pace, or repeat the same question, or become sharp with you in a way that doesn’t feel like them.
Families call it many things. Clinicians call it sundowning: a pattern of increased confusion, agitation, and restlessness that appears in the late afternoon and evening, most often in people living with dementia.
Why it happens
There isn’t one single cause, which is part of what makes it so frustrating. The contributing factors usually include some mix of the following:
- Disrupted internal body clock. Dementia can damage the part of the brain that regulates sleep-wake cycles, so the usual cues about time of day stop working properly.
- Accumulated fatigue. Holding it together all day takes enormous mental effort. By late afternoon, the reserves are gone.
- Fading light and shadows. Dim rooms and long shadows make the environment harder to interpret, which can be genuinely frightening.
- Unmet needs that are hard to express. Hunger, thirst, pain, needing the bathroom, or being too warm or cold often surface as agitation rather than words.
- End-of-day commotion. Dinner prep, TV noise, people coming home — the busiest hour of the household arrives exactly when tolerance is lowest.
What actually helps
Turn the lights on before the sun goes down
Don’t wait for dusk. Brightening the room in mid-afternoon, closing blinds before shadows form, and adding lamps in dim corners reduces the visual confusion that fuels anxiety. Motion-sensor night lights along the path to the bathroom help after dark.
Protect the late afternoon
Schedule appointments, visits, baths, and anything demanding for the morning, when they’re at their best. Keep the 4–7pm window quiet and predictable: same routine, same order, every day.
Get morning light and daytime movement
Time outside in the morning, or sitting by a bright window, helps reset the body clock. Gentle activity during the day supports better sleep at night. Limit late-day naps to short ones, and keep caffeine and heavy meals to earlier hours.
Lower the noise
Turn off the television — especially the news. Put on familiar quiet music instead. Fewer people in the room, fewer competing sounds, fewer decisions to make.
Respond to the feeling, not the facts
When someone insists they need to go home, or that they have to pick up the children, correcting them rarely works and usually escalates things. What helps is acknowledging the emotion underneath — “you’re worried about getting home” — and then gently redirecting: a snack, a task to help with, a photo album, a short walk down the hall.
It feels dishonest at first. It isn’t. You’re meeting them where they are instead of demanding they meet you where you are.
Keep a simple log
For one week, jot down when episodes start, what happened just before, and what helped. Patterns emerge faster than you’d expect — a particular time, a specific trigger, a routine that consistently settles things. That log is also genuinely useful to bring to a doctor’s appointment.
When to call the doctor
Talk to their physician if the agitation appears suddenly or gets sharply worse, if there are signs of pain or infection, if they aren’t sleeping, if new medications were recently started, or if safety — theirs or yours — is becoming a concern. Sudden changes in particular deserve a same-day call, since infections and medication side effects can look a lot like worsening dementia.
And one thing for you
Sundowning arrives at the hour when caregivers are most depleted. If you can arrange for someone else to take the evening shift once or twice a week — family, a friend, respite care — that isn’t a luxury. It’s maintenance on the person doing the caring, and it matters as much as anything on this list.
This article is for general information and is not medical advice. Always consult a qualified healthcare professional about symptoms, diagnosis, and treatment.
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