Sundowning in Dementia: What It Is & How to Manage It

Sundowning is a pattern of increased confusion, restlessness and agitation that appears in the late afternoon or early evening in people with dementia. It’s one of the most exhausting parts of caring for someone at home — partly because it arrives exactly when the carer is most tired.

What sundowning looks like

It typically starts as the light fades and can last into the night. Common signs:

• Restlessness, pacing, or repeatedly trying to leave the house
• Agitation, irritability or shouting, often out of character
• Increased confusion about time and place
• Insisting they need to go home — while at home
• Wanting to collect children from school, or get to work
• Suspicion, or seeing things that aren’t there
• Difficulty settling at bedtime and waking through the night

The “I need to go home” phrasing is worth understanding. It usually isn’t about the building. It’s about a feeling of safety they associate with an earlier time in life — often childhood, often a parent. Arguing about the address misses the point entirely.

Why it happens

There’s no single cause, and probably several acting together:

• Disrupted body clock. Dementia damages the part of the brain regulating sleep-wake cycles, so the cues that tell us it’s evening get scrambled.
• Accumulated fatigue. Holding it together all day is genuinely effortful with dementia. By late afternoon, the reserve is gone.
• Reduced light. Fading daylight creates shadows and visual ambiguity, and dementia impairs interpretation of what’s seen.
• Activity at the wrong time. Households get busier at 5pm — cooking, television, people arriving, phones.
• Unmet physical needs — hunger, thirst, needing the toilet, pain, constipation.
• Old routines resurfacing. Someone who collected children at 3:30pm for twenty years may still feel that pull.

Rule out the reversible first

Before treating this as “just dementia”, check for causes that can be fixed — this is where most improvement comes from:

• Infection, particularly urinary. Sudden worsening in an established pattern warrants a same-day GP call.
• Pain. Someone who can’t report arthritis or toothache may express it as agitation.
• Constipation — extremely common and easily missed.
• Medication timing or side effects. Ask the pharmacist for a review, including whether anything is due to be taken at a better hour.
• Hunger, thirst, or needing the toilet.
• Sight and hearing. Out-of-date glasses and flat hearing aid batteries both make dusk much harder.

Practical steps that help

Light

• Turn lamps on before the light starts to fade, not after. Pre-empting the transition matters more than brightness.
• Close curtains at dusk — reflections in dark windows are frequently misinterpreted.
• Get daylight into the morning: time outdoors, or sitting by a window at breakfast, helps reset the body clock.

Routine

• Keep afternoons calm and predictable. Save appointments, baths and demanding tasks for the morning.
• Limit daytime napping to earlier and shorter.
• Stop caffeine by early afternoon; watch alcohol, which worsens confusion.
• Offer a proper mid-afternoon snack and a drink before the difficult window.
• Make the evening the same shape every night. Familiar sequence does the work that memory can’t.

In the moment

• Stay calm and lower your voice. Agitation is contagious in both directions.
• Don’t argue or correct. “You are home” rarely lands. Try “tell me about home” instead.
• Validate, then redirect. “You’re worried about the children. Let’s have a cup of tea and then sort it out.”
• Offer a job. Folding towels, sorting cutlery, pairing socks. Purposeful activity settles restlessness better than persuasion.
• Music from their teens and twenties. Reliably effective, and one of the few things that works when words don’t.
• Try a short walk if it’s safe — movement discharges agitation.
• Reduce noise. Turn the television off.
• Step out for a minute if you’re losing patience. Coming back calm is more useful than staying and snapping.

When to ask for more help

Speak to the GP or memory service if sundowning is getting worse, if it’s new and sudden, if there’s a safety risk from leaving the house at night, or if the family carer isn’t sleeping. Medication is sometimes considered but is not the first answer — and certain antipsychotics carry real risks in dementia, particularly with Lewy body dementia. Environmental and routine changes come first.

Practically, many families reach a point where the nights need covering. Overnight care — a carer present through the night — is often what allows someone to stay at home rather than move. See waking nights vs sleeping nights and register for the Herbert Protocol with Sussex Police if there’s a risk of them leaving at night (see dementia care at home).

Frequently asked questions

What is sundowning in dementia?

A pattern of increased confusion, restlessness and agitation that appears in the late afternoon or evening. It’s thought to result from a disrupted body clock, accumulated fatigue, reduced light and unmet physical needs acting together.

How long does sundowning last?

Episodes typically last from an hour to several hours and often ease as the evening settles. As a phase it’s most common in the middle stages of dementia and frequently reduces later on.

What helps sundowning?

Turning lights on before dusk rather than after, keeping afternoons calm, limiting late naps and caffeine, offering a snack before the difficult window, and using purposeful activity or familiar music in the moment. Don’t argue or correct — validate the feeling and redirect.

Why does my relative say they want to go home when they’re already home?

It’s usually about a feeling of safety associated with an earlier time in life rather than the building itself. Asking them to describe home, and responding to the emotion, works better than correcting the facts.

Should sundowning be treated with medication?

Not as a first step. Rule out infection, pain, constipation and medication side effects first, then try environmental and routine changes. Where medication is considered, discuss risks carefully with the GP — some antipsychotics carry significant risks in dementia, especially Lewy body dementia.

The Care Panel is an independent publication. We are not a care provider and are not regulated by the Care Quality Commission, because we do not deliver care. Always check a provider’s own CQC registration and inspection report before you commit.

Written and fact-checked by The Care Panel. Last updated September 2026. Sources include the Alzheimer’s Society, Dementia UK and NICE guidance. General information, not a substitute for medical advice.