If you have watched a parent or partner become suddenly confused, restless, or distressed as the afternoon fades into evening, you have most likely seen sundowning. Seeing it for the first time is frightening, and you may not know what is happening or what you are meant to do. This article explains what sundowning is, why it happens, and what genuinely helps when you are caring for someone at home. If your evenings have become the hardest part of the day, you are not doing anything wrong. This is one of the most demanding parts of caring for someone with dementia, and it deserves to be understood properly.
What Is Sundowning?
Sundowning is a pattern of increased confusion, agitation, and restlessness that appears in the late afternoon and evening in some people with dementia. It typically begins in the mid-afternoon and can continue into the night. It is not a separate condition, but a recognised cluster of symptoms, sometimes called sundown syndrome or sundowner’s syndrome. None of these terms describes a diagnosis in its own right.
Despite the name, sundowning is not always linked to the sun setting, and the timing varies from person to person. It is seen in people with Alzheimer’s disease and other forms of dementia, and it appears most commonly in the middle and later stages. It is thought to affect around 20% of people with dementia, rising to around 80% of those living in residential settings such as care homes, according to Dementia UK. That gap between home and residential care is striking, and we come back to what it means later. Estimates vary widely between studies, so these figures are best treated as a guide. Not everyone with dementia experiences sundowning, and for those who do, it does not always happen every night.
What Does Sundowning Look Like? Signs to Recognise
From your point of view as a family carer, sundowning usually shows up as a shift in mood and behaviour in the late afternoon or early evening, often somewhere between around 3pm and 7pm. Spotting the early signs gives you the best chance to step in gently before distress takes hold.
The signs you might notice include:
- Increased confusion or disorientation, such as not knowing where they are or what time it is
- Restlessness, pacing, fidgeting, or an inability to settle
- Agitation, irritability, or distress that can escalate quickly
- Repeated questions or statements, often about the same worry
- Insisting on doing something that no longer applies, such as collecting children from school or going to work
- Trying to leave the house, which can be a safety concern
- Hallucinations or delusions in some people, particularly with Lewy body dementia
- Difficulty settling to sleep, or waking in the night confused and distressed
A person who is sundowning may seem completely convinced that they are in the wrong place, or that there is something urgent they have forgotten to do. To them, that sense of urgency is real and pressing. Understanding that these behaviours make sense from their perspective can make the moment a little easier to hold.
Why Does Sundowning Happen?
The honest answer is that the causes are not fully understood, and they seem to vary from person to person. It is rarely down to any single cause, and most people who experience sundowning are affected by more than one of the following at once:
- Circadian rhythm disruption. Dementia damages the parts of the brain that regulate the internal body clock, so it no longer reliably signals when day is turning to night. This is the most widely cited underlying mechanism.
- End-of-day fatigue. Both the person with dementia and you, as their carer, are likely to be at your most tired by late afternoon. Tiredness lowers the threshold for agitation.
- Reduced natural light and increased shadows. As daylight fades, reflections in windows and mirrors and the shift between natural and artificial light can be disorienting.
- Unmet physical needs. Hunger, thirst, pain, constipation, or needing the toilet can all cause distress the person cannot put into words, and this can be misread as sundowning.
- Over- or understimulation. A noisy, busy afternoon can leave someone overwhelmed, but a passive day with little to do can equally lead to restlessness. This second trigger is often overlooked.
- Medication wearing off. For some medicines with time-limited effects, symptoms can resurface in the late afternoon as a dose becomes less effective.
Seasons matter too. In autumn and winter, shorter days reduce daylight exposure, and the clocks going back in late October brings an abrupt shift between light and clock time that has been reported to trigger or worsen sundowning for some people. Adjusting routines gradually around the clock change, and making the most of afternoon daylight, can soften the impact.
Practical Ways to Manage Sundowning at Home
There is no single remedy, and no approach works on every night. What helps most is combining a few practical strategies and applying them consistently. The suggestions below are drawn from practitioner guidance and from what experienced carers report, rather than from firm clinical proof.
Light and the environment. Keeping the home well lit as daylight fades is one of the most consistently recommended steps. Turn on lamps and overhead lights before dusk to remove the confusing transition between natural and artificial light, and close curtains before dark to reduce reflections and shadows. Covering mirrors in the evening helps if the person no longer recognises their reflection, and a dementia clock showing the day and time of day can help ground someone who has lost track of time. You may come across bright light therapy, but the Alzheimer’s Society notes there is not yet enough evidence to recommend it as a standard treatment, so it is best not to expect a single device to solve the problem.
Routine and activity through the day. A consistent daily routine is one of the most effective preventive tools you have. Predictable mealtimes, wake times, and bedtimes help regulate the body clock. Where you can, schedule more demanding activities for the morning, when people with dementia tend to be more alert, and keep evenings deliberately calm. Gentle physical activity and time outdoors earlier in the day support better sleep, while limiting long afternoon naps stops them interfering with the night.
Checking basic needs. Before responding to evening agitation as sundowning, check for an unmet physical need. Is the person hungry, thirsty, too warm or cold, in pain, or in need of the toilet? Many episodes are triggered by discomfort the person cannot describe. If symptoms have worsened suddenly or seem out of character, a urinary tract infection or other infection is worth considering, and it is best to speak to a GP.
Responding calmly in the moment. During an episode, the way you respond matters enormously. Speak slowly, use short and simple sentences, and resist the urge to correct or argue about what is real. Validating how someone feels, with something like “I can see you’re worried, let’s stay together,” reassures them without reinforcing a belief that is not accurate. Gentle physical comfort, such as holding their hand, can help when words start to lose their effect. Offering a familiar, low-demand distraction early, a favourite piece of music, a hot drink, or a move to a quieter room, can redirect attention before agitation builds. Keeping background noise down through the evening lowers the sensory load at a time when the person is least able to process it.
Sundowning, Dementia Stages, and What to Expect
Sundowning is most common in the middle and later stages of dementia, though it can appear at any stage. It is not a sign that the condition has suddenly worsened, and it can ease at some points and worsen at others rather than occurring every night.
It is also worth naming honestly that sundowning can be exhausting for you, the family carer, as much as for the person you love. If you are finding the evenings harder and harder, that is not a failing on your part. It is a sign that the level of care and support needed is increasing. You are far from alone in feeling this: a 2018 Alzheimer’s Society survey found that around nine in ten carers experience stress and anxiety several times a week.
For a fuller picture of dementia and the support available, visit our dementia care hub. For a closer look at how the condition progresses, see our article on the stages of dementia.
When to Seek Medical Advice
Sundowning that follows a consistent daily pattern can usually be managed at home. Some changes, though, need a GP or medical assessment. As a rule, seek advice when confusion appears suddenly, worsens sharply, or is clearly out of character.
Contact a GP if:
- Sundowning has appeared suddenly, or worsened sharply over hours or a day or two. This rate of change is not typical of dementia progression.
- The person has a new fever, seems generally unwell, is eating or drinking noticeably less, or shows signs of an infection such as a urinary tract infection.
- Hallucinations are new, severe, or causing real fear.
- Behaviour is putting the person or others at risk of harm.
- Sleep disruption is severe and persistent despite consistent non-drug approaches.
Telling Sundowning and Delirium Apart
This is one distinction families are rarely told about clearly, and it is an important one. Sundowning follows a recognisable daily pattern, happening at around the same time each evening and staying broadly consistent for that person. Delirium, by contrast, is a state of sudden, intense confusion that develops over hours or a day or two. It can be present throughout the day rather than just the evening, often causes more severe disorientation, and marks a clear departure from the person’s normal state.
Dementia UK notes that delirium can, in rare cases, be life-threatening, and that its underlying cause, whether a urinary tract infection, dehydration, pain, or a medication change, needs prompt treatment. Delirium is often reversible once the cause is found and treated. If you notice a sudden, sharp change that is not the usual sundowning pattern, treat it as a reason to contact a GP urgently.
A Note on Medication
In most cases the non-drug strategies above are the right first approach, and this is in line with national guidance on behavioural symptoms in dementia. Medication is very much a last resort. Some medicines, particularly antipsychotics, carry serious risks in older adults with dementia, and any decision to use them should be guided by a GP or specialist, prescribed for the shortest effective time, and reviewed regularly.
How a Consistent Live-In Carer Can Make a Difference
Much of what helps with sundowning comes down to two things: knowing the individual, and being there consistently. A carer who is present every day, week after week, builds a detailed picture of one person’s sundowning pattern. They learn when episodes tend to start, which triggers unsettle that individual, and which calming approaches work. This pattern-based knowledge cannot easily be replicated by a rotating team of visiting carers, or in a setting where staff change through the day.
This is also where that earlier statistic becomes meaningful. Sundowning affects around 20% of people with dementia at home, but up to 80% of those in residential care. The factors that differ between the two include the familiarity of the surroundings, the predictability of the routine, and the consistency of the people present. Familiar surroundings and a familiar face are not just comforting extras. They are part of managing sundowning itself.
This is how we approach live-in dementia care at VersaCare. Because families cannot always be there in the evenings, our electronic care reporting lets you see what happened each evening, including how an episode was handled and what seemed to help. And we match carers carefully so the same person is with your relative consistently, which is the very foundation of pattern-based dementia care.
If you are finding sundowning hard to manage, or simply wondering whether more consistent support might help, we are here to talk it through with no pressure either way. You can call us free on 0800 0087 661 for a no-obligation conversation, or visit our contact page. To understand what this kind of support involves, you can also read more about our live-in dementia care.
Frequently Asked Questions
What Stage of Dementia Is Sundowning Most Common In?
Sundowning is most common in the middle and later stages of dementia, though it can appear at any stage. It does not always occur every night, and not every person with dementia will experience it. Its onset or worsening can be a signal that the level of support needed is increasing.
Can You Have Sundowning Without Dementia?
Sundowning is most commonly associated with dementia. However, older adults experiencing delirium, caused by an infection, dehydration, or a medication reaction, can present with similar evening confusion. This is a distinct and usually temporary condition that requires medical attention. If confusion has come on suddenly and is not the usual pattern, speak to a GP.
What Are the First Signs of Sundowning?
Early signs often include becoming more restless or unsettled in the late afternoon, asking repeated questions, expressing a strong urge to “go home” even when already at home, increased irritability, or becoming convinced that something important has been left undone. Pacing, plucking at clothes, and difficulty sitting still are also common.
What Triggers Sundowning?
Common triggers include end-of-day tiredness, reduced natural light, hunger, thirst, pain, needing the toilet, overstimulation or understimulation during the day, and disruption to a daily routine. The body-clock changes that occur in dementia mean the brain misreads the time of day, and these triggers can accelerate that confusion.
How Do You Stop Sundowning?
There is no single remedy. The most effective approach combines a consistent daily routine, good natural light during the day, a calm and well-lit evening environment, and careful attention to unmet physical needs. Calm reassurance without argument, and gentle distraction with familiar activities or music, are the first responses to try during an episode.
How Long Does Sundowning Last Each Night?
It varies between individuals and from night to night. Episodes may last from around thirty minutes to several hours. In some people, symptoms ease before bedtime; in others, they continue into the night, causing significant sleep disruption for both the person with dementia and their carer.