Sundowning: Understanding and Managing Late-Day Dementia Symptoms

Many care staff will recognise the pattern even if they have not heard the term for it: a resident living with dementia who is calm through the morning and early afternoon becomes increasingly confused, anxious, or agitated as the light starts to fade. This is sundowning, one of the most common and most disruptive dementia symptoms in care settings, and understanding what drives it changes how effectively staff can respond.

What Sundowning Is and How Common It Is

Sundowning describes feelings of intense confusion, anxiety, and agitation that typically emerge in the late afternoon and evening, around dusk, in people living with dementia. Dementia UK notes that episodes commonly begin around 4 to 5pm and can continue into the evening or persist until bedtime, sometimes lasting several hours. The scale of the issue in care settings is striking: while an estimated 20% of people with dementia living in the community experience sundowning, that figure rises to roughly 80% among people with dementia in residential care — making it something most care staff working with residents living with dementia will encounter regularly, not an unusual or rare presentation.

What Actually Causes It

Sundowning is not a single, simple cause but the result of several factors that tend to converge in the late afternoon. Fatigue and cumulative sleep disruption from the day play a significant role, as do unmet physical needs such as hunger, thirst, or discomfort that a resident may struggle to communicate directly. A lack of sufficient daytime activity or exposure to natural light can disrupt the body's circadian rhythm, making the transition into evening more disorientating. Overstimulation from a busy environment — mealtime bustle, shift changeover noise, or a television left on in the background — can also tip a resident from calm into distress. Medication timing and side effects can contribute too, which is part of why a sudden change in a resident's evening behaviour is worth mentioning to whoever reviews their medication, not just managed environmentally.

Practical Management Strategies

Consistent daily routines, including regular daytime activity and time outdoors or near natural light where possible, help regulate the circadian rhythm that sundowning disrupts, making evenings calmer over time even though the benefit is not always immediate. Dementia clocks that clearly display the day, date, and time can help residents orient themselves, and keeping the evening environment calm and dimly but adequately lit, avoiding sudden noise or overstimulation from television or a busy dining room, reduces one of the common triggers.

When a resident does show signs of sundowning, how staff respond in the moment matters. Slow, soothing speech using simple sentences, without confronting or directly contradicting what the resident believes is happening, tends to de-escalate distress far more effectively than trying to correct or reason with them. Gently orienting the resident to the current time and place, offering a distraction such as familiar music, a comfort object, or a favourite snack, and providing physical comfort like a reassuring hand to hold can all help settle agitation. It is also worth checking for an unmet need behind the behaviour — pain, hunger, needing the toilet, or simple tiredness are all common and easily missed triggers hiding behind what looks like pure confusion.

Medication for sundowning specifically is generally avoided unless a resident has a clearly identified symptom, such as significant anxiety, that warrants it — environmental and behavioural approaches remain the first line of response in most guidance.

Distinguishing Sundowning from Wider Behaviours That Challenge

Sundowning is a specific, time-linked pattern within the broader area covered in positive behaviour support and managing behaviours that challenge — the general de-escalation and person-centred principles in that training apply here too, but recognising the specific late-afternoon timing and circadian link of sundowning helps staff plan proactively around it, rather than only reacting once distress has already built. This connects as well to the environmental principles in dementia-friendly environment design, since predictable, well-lit, low-stimulation evening spaces are one of the most effective preventative tools available for reducing how often and how severely sundowning occurs.

Planning Ahead of the Evening Rather Than Just Reacting

Because sundowning follows a predictable daily pattern for most residents who experience it, staff can plan around it rather than only responding once distress has already set in. Scheduling a resident's most demanding activities, appointments, or visits earlier in the day, and keeping the late afternoon and early evening calmer and more predictable, reduces the cumulative fatigue and stimulation that often tips into sundowning. Handover between shifts should flag which residents are known to sundown and what has worked for them individually in the past, since the most effective approach — a particular piece of music, a specific comfort object, a familiar member of staff — is often personal to that resident rather than universal.

Keeping a simple record of when a resident's sundowning episodes occur and what preceded them can help identify individual triggers over time, such as a particular noise, a specific member of staff finishing their shift, or a consistent unmet need like thirst. This pattern-spotting turns a distressing daily event into something staff can genuinely anticipate and reduce, rather than a mystery that repeats every evening without explanation.

Frequently Asked Questions

How common is sundowning in care homes?
Around 80% of people with dementia in residential care experience sundowning, compared with roughly 20% of people with dementia living in the community, making it a common presentation in care settings.

What time of day does sundowning typically start?
Episodes commonly begin around 4 to 5pm and can continue into the evening, sometimes lasting several hours or persisting until bedtime.

Should staff try to correct or reason with a resident who is sundowning?
No. Slow, soothing speech without confrontation or direct contradiction, combined with gentle orientation and addressing any unmet need, is far more effective than trying to correct what the resident believes is happening.