Sundowning and Dementia: How to Manage It (2026)

If someone you care for becomes more confused, restless or distressed as the day fades, you're seeing a pattern known as sundowning. It's exhausting to watch and hard to manage alone — but understanding why it happens makes it easier to respond well.

What is sundowning?

Sundowning is not a diagnosis in its own right. It's a term used to describe a worsening of dementia symptoms — confusion, agitation, anxiety, pacing, or resistance to care — that tends to build up during the late afternoon and evening. It can ease off, or shift into disturbed sleep overnight.

It's very common, particularly in the middle stages of dementia, though not everyone experiences it and it doesn't affect everyone the same way. Some people have mild restlessness; others become genuinely frightened or distressed. See Alzheimer's Society — about dementia for more on how symptoms change through the stages.

Why does sundowning happen?

There's no single cause, and researchers don't fully understand it. The likely explanation is a combination of factors that tend to stack up as the day goes on:

• Tiredness. By late afternoon, both the person with dementia and their carer are more fatigued, and coping resources are lower.
• A disrupted body clock. Dementia can affect the part of the brain that regulates sleep and wake cycles, so the usual cues that "it's evening, time to wind down" don't work as they should.
• Fading light. As daylight drops, shadows lengthen and rooms look different. For someone with dementia, this can trigger misperception — a coat on a hook might look like a person, for example.
• Unmet needs. Hunger, thirst, needing the toilet, pain or discomfort are all more likely to build up unspoken by the end of the day.
• Too much stimulation, or too little. A noisy, busy household in the early evening — or, conversely, a long stretch with nothing to do — can both unsettle someone.

Sundowning can also be a sign of something medical: an infection (urinary infections are a common trigger of sudden confusion), dehydration, pain, or a side effect of medication. This is why sudden or worsening sundowning is always worth raising with a GP rather than assuming it's "just dementia".

How can you manage sundowning day to day?

You won't stop sundowning entirely, but a few consistent habits reduce how often it happens and how bad it gets.

Keep a predictable routine

Regular times for waking, meals, activity and bed help the body's clock, even when the internal signals are unreliable. Try to keep the daily rhythm the same, including at weekends.

Get the light right

Turn lights on before dusk, not after it's already dark. Bright light in the morning and afternoon, and good indoor lighting as evening draws in, both help. Avoid deep shadows and unlit corners in rooms the person uses.

Use up energy earlier in the day

A short walk, some gentle activity, or time outdoors earlier in the day can reduce restlessness later on. Avoid introducing new or stimulating activity in the late afternoon itself.

Watch food, drink and toileting

A light, early evening meal tends to work better than a large late one. Keep an eye on fluid intake through the day, and offer the toilet before things escalate — needing to go can present as agitation rather than a clear request.

Simplify the evening

Reduce background noise — turn the TV down or off, keep visitors to a minimum in the late afternoon, and create a calm, familiar space. Consistency in who is around and what happens next matters more than it might seem.

What should you do when distress rises in the moment?

1. Stay calm. Your tone and body language are contagious — a raised voice or visible worry tends to make things worse.
2. Reassure, don't correct. If they say something confused or untrue, comfort them rather than argue the facts. Arguing or over-explaining rarely helps and often escalates distress.
3. Redirect gently. Offer a simple activity, a familiar object, or a small snack or drink to shift attention.
4. Reduce stimulation. Lower the noise, tidy visual clutter, and give the person space rather than crowding them.

When should you contact the GP?

Mention sundowning to the GP if it's new, sudden, or getting noticeably worse. Possible underlying causes include:

• Pain that hasn't been identified or treated
• A urinary tract infection or other infection
• Dehydration
• A side effect or interaction from medication
• Poor sleep or an untreated sleep disorder

The GP may review medication, arrange tests, or refer to a memory service. For general guidance on symptoms and support, see the NHS on dementia and Dementia UK, which runs a specialist Admiral Nurse helpline for families dealing with day-to-day dementia symptoms.

How do care homes manage sundowning?

Good dementia care homes are experienced with sundowning and build their evening routines around it: dimming and warming the lighting gradually rather than switching abruptly, keeping mealtimes and activities predictable, and having enough staff on hand during the late-afternoon period when distress is most likely.

If you're choosing a home, ask directly:

• How do you structure the late afternoon and evening for residents with dementia?
• What's your staffing level like at that time of day, compared with the morning?
• How do staff respond when someone becomes distressed or agitated?
• Can you show me the home's CQC rating and latest inspection report?

You can check any home's current rating and inspection history on the Care Quality Commission (CQC) website before you visit.

Looking after yourself as a carer

Sundowning often lands hardest on family carers at the end of an already long day. It's worth building in your own breaks where you can, and asking for support rather than managing alone. Carers UK offers practical guidance and a helpline for unpaid carers, and a council care needs assessment can identify support you're entitled to, including respite care.