Sundowning: Why Confusion Gets Worse in the Evening, and What Actually Helps

If you've noticed that your parent seems more or less themselves in the morning, but becomes restless, anxious, confused or agitated as the afternoon wears into evening — you're not imagining it, and it has a name. It's called sundowning, it's extremely common in dementia, and while it can be exhausting and upsetting, there's a lot you can do to ease it.

What sundowning actually is

Sundowning isn't a separate condition or a "bad day." It's a recognised pattern where the symptoms of dementia — confusion, agitation, anxiety, restlessness, sometimes anger or a determination to "go home" even when they're already home — reliably get worse in the late afternoon and evening, as the light fades.

Nobody fully understands why it happens, but the leading explanations point to a mix of things: the body clock that governs sleep and wakefulness becomes disrupted by dementia, the person is simply worn out by the mental effort of the day, and the fading light creates shadows and uncertainty that feel unsettling.

The key thing to hold onto: it's the dementia talking, not your parent. They're not being difficult on purpose, and they often can't help it.

The common triggers

Sundowning is usually set off or worsened by a combination of:

• Tiredness — by late afternoon, the cumulative effort of the day catches up.
• Fading light and shadows — dimness increases confusion and can make ordinary objects look frightening.
• Hunger or thirst — easily overlooked, and easily fixed.
• Too much stimulation — a busy, noisy day, or a hectic evening with TV blaring and several people about.
• Disturbed sleep — daytime napping and poor nights feed the cycle.
• Pain or discomfort — which they may not be able to express clearly.

A simple diary noting when episodes happen and what came before can reveal your parent's particular pattern surprisingly quickly.

A practical evening routine that helps

The single most effective approach is calm, light and predictability. Try building in some of these:

1. Get ahead of the light. Turn lamps on before dusk, not after, so the home stays bright and shadow-free as the daylight goes. Good lighting is one of the biggest levers (more on this in our dementia-friendly home guide).
2. Keep a steady rhythm. A predictable daily routine — meals, activity and bedtime at roughly the same times — helps settle the body clock.
3. Front-load the day. Encourage daylight, fresh air and gentle activity in the morning and early afternoon, when your parent has most in the tank. Discourage long late-afternoon naps.
4. Wind down the evening. Lower the noise and activity as evening approaches. One calm thing — familiar music, a quiet programme, a gentle chat — rather than lots going on.
5. Watch food and drink. Avoid caffeine and heavy meals late in the day; make sure they're not hungry or thirsty, which can masquerade as agitation.
6. Comfort check. Are they too hot, too cold, in pain, needing the loo? Sorting an unspoken discomfort can stop an episode in its tracks.

In the moment

When an episode is happening, your own calm is the most useful tool you have:

• Stay gentle and reassuring. A soft voice and an unhurried manner help; agitation feeds off agitation.
• Don't argue or correct. If they insist they need to "go home" or "collect the children," arguing the facts rarely works and often escalates things. Acknowledge the feeling ("you're worried about getting home — you're safe here with me") rather than debating the reality.
• Redirect gently. A change of focus — a snack, a familiar song, a look at old photos, a short walk to another room — can break the loop.
• Reduce the triggers you've identified: close the curtains to hide unsettling shadows, turn off the background noise.

When to talk to the GP

Sundowning itself is common, but it's worth a GP conversation if it comes on suddenly or worsens sharply (which can signal an infection or other treatable cause), if your parent isn't sleeping at all, or if they become distressed or aggressive in a way that isn't safe to manage. The GP can check for underlying causes and discuss options. The Alzheimer's Society has further practical guidance.

You're not failing because the evenings are hard

The end of the day is when carers are most depleted too — which is exactly when sundowning hits hardest. If the evenings are wearing you down, please don't carry it silently; our piece on carer burnout and the support you're entitled to is worth a read.

And if it helps to talk through your parent's specific pattern and what might ease it, that's the kind of practical question Carewise is built for, with a real specialist available when you need one. You can try it free here.

Small, consistent changes to the rhythm of the day genuinely add up here. It rarely disappears overnight, but most families find the evenings become noticeably calmer with a bit of structure and a lot of patience.

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This guide is general information for the UK, accurate as of June 2026, and isn't medical advice. If your parent's confusion comes on suddenly or worsens sharply, contact their GP, as it can indicate a treatable cause such as an infection.