Sundowners: An Evidence-Based Guide for Patients

Sundowners, also called sundowning, describes a pattern of worsening confusion, restlessness, anxiety, or agitation later in the day, most often in people living with dementia. It is not a separate disease, but a symptom pattern that can improve when triggers are identified and the underlying condition is assessed and treated.

What sundowners means

Sundowners is a common term for a pattern in which confusion, agitation, pacing, irritability, anxiety, or other behavioral changes become more noticeable in the late afternoon, evening, or at night. Healthcare professionals often call this sundowning. It is seen most often in older adults with dementia, especially when the brain has more difficulty processing changes in light, routine, stimulation, and fatigue as the day goes on.

Sundowners is not a diagnosis by itself. Instead, it is a clue that a person may have an underlying condition affecting memory, thinking, sleep, or behavior. In many cases, the main condition is Alzheimer’s disease or another form of dementia, but symptoms can also be made worse by discomfort, hunger, dehydration, medication side effects, infections, poor vision or hearing, and changes in surroundings.

Families often notice that the person seems relatively calm earlier in the day but becomes unsettled when daylight fades. This can be distressing for both the patient and caregiver, but it is not unusual and does not mean anyone is doing something wrong. Understanding the pattern is the first step toward reducing triggers and making evenings more manageable.

Common signs and how symptoms may appear

The symptoms of sundowners can vary from person to person. Some people become mildly restless or more repetitive in speech, while others may seem frightened, suspicious, withdrawn, or more confused about where they are. These changes often happen at a similar time each day, though the severity may differ from one evening to another.

Common features include difficulty following conversations, increased pacing, calling out, trouble settling down for sleep, resisting care, mood swings, and seeing or misinterpreting things in dim light. Caregivers may also notice that the person becomes more demanding, more easily upset by noise, or less able to cope with small changes in routine.

• Worsening confusion in late afternoon or evening
• Restlessness, wandering, or pacing
• Anxiety, irritability, or sudden tearfulness
• Suspicion, fearfulness, or misinterpretation of surroundings
• Difficulty falling asleep or staying asleep
• Changes in attention, communication, or cooperation with care

These symptoms overlap with other conditions, which is why timing matters. A daily pattern that appears mainly later in the day may suggest sundowning, while sudden confusion at any time of day may point to delirium or another medical issue that needs prompt evaluation.

Why sundowners happens

There is no single cause of sundowners. Experts believe it usually develops from a combination of brain changes, daily fatigue, environmental factors, and unmet physical needs. In dementia, the brain may have more difficulty regulating the sleep-wake cycle, interpreting visual cues in dim light, and adapting to transitions such as shift changes, meal times, or bedtime routines.

Fatigue is an important contributor. By evening, a person may have used much of their mental energy and become less able to process information calmly. Low lighting can create shadows and visual confusion, especially in someone with poor eyesight. Noise, visitors, television, and household activity late in the day can add overstimulation just when the brain is least able to filter it.

Medical and physical triggers also matter. Pain, constipation, urinary symptoms, dehydration, hunger, infection, medication changes, alcohol use, and sleep disruption can all intensify evening symptoms. This is one reason a medical review is valuable. Treating the underlying trigger may reduce agitation more effectively than focusing on the behavior alone.

Sundowning is especially associated with neurodegenerative illnesses such as Alzheimer’s disease, but it may also occur in other cognitive disorders. If symptoms are persistent, a specialist may recommend a broader evaluation, sometimes including neurology assessment when memory, behavior, or sleep changes are becoming more frequent.

How doctors evaluate sundowners

Diagnosis begins with a careful history rather than a single test. A doctor will usually ask when symptoms started, what time of day they occur, what the behavior looks like, and whether there has been a recent illness, fall, medication change, or disruption to the home routine. Input from family members or caregivers is often essential because they observe the day-to-day pattern most clearly.

The clinician may review memory and thinking symptoms, sleep habits, mood, vision and hearing, diet, fluid intake, bowel and bladder changes, and safety concerns such as wandering. A physical examination and medication review can help identify pain, dehydration, infection, or side effects. Blood tests or other studies may be recommended when an underlying medical problem is suspected.

One important goal is to distinguish sundowning from delirium. Delirium is a sudden change in attention and awareness that may happen because of infection, medication effects, surgery, metabolic problems, or other acute illness. Delirium can be serious and often needs urgent treatment. In some cases, brain imaging or MRI may be considered if there are new neurological symptoms, unexplained decline, or another reason to look for structural causes.

If dementia is suspected but not yet diagnosed, the person may need a fuller cognitive evaluation. This helps clarify whether symptoms fit Alzheimer’s disease or another condition and guides practical treatment planning for both patient and family.

Treatment and management options

The best treatment for sundowners depends on the cause. Most care plans begin with non-drug strategies, because identifying triggers and changing the environment can significantly reduce evening distress. Doctors also look for treatable medical problems such as infection, pain, constipation, urinary retention, medication side effects, depression, or poor sleep.

Helpful approaches often include keeping wake-up, meals, activity, and bedtime consistent; encouraging daylight exposure and gentle daytime exercise; limiting long naps late in the day; and reducing overstimulation in the evening. Better lighting before and after sunset may reduce fear and visual misinterpretation. Hearing aids, glasses, familiar objects, and a calm voice can also support orientation.

Medications are not the first answer for most people, but they may be considered when symptoms are severe, dangerous, or linked to a specific condition such as depression, sleep disturbance, or significant behavioral symptoms in dementia. Any medication choice should be individualized, especially in older adults, because side effects can include sedation, falls, or worsened confusion.

When a person has progressive memory loss or other symptoms of a neurodegenerative disorder, management may involve coordinated care from geriatrics, psychiatry, and neurology specialists. At Acibadem International, multidisciplinary specialists in JCI-accredited hospitals evaluate and treat patients with dementia-related behavioral symptoms, including those traveling internationally for care.

Practical self-care and caregiver strategies

For many families, daily habits make a meaningful difference. It can help to plan demanding tasks such as bathing, appointments, or outings earlier in the day, when the person is more alert. Evenings are often easier when they are predictable, quiet, and not rushed. Small changes are usually more sustainable than trying many new techniques at once.

Caregivers can keep a simple diary of symptoms, noting the time they begin, what happened beforehand, and what seemed to help. This may reveal patterns such as hunger before dinner, increased noise in the home, fatigue after visitors, or confusion in dark rooms. Once triggers are recognized, they can often be reduced.

• Keep lighting warm and steady as daylight fades
• Offer regular fluids and simple evening meals or snacks if needed
• Use reassuring, short sentences rather than arguing or correcting
• Reduce background noise from television or crowded rooms
• Encourage daytime movement and natural light exposure
• Create a familiar bedtime routine with calm activities

Caregiver wellbeing matters too. Repeated evening agitation can be exhausting, and support from family, respite services, or dementia support groups may help. If safety is becoming difficult to manage at home, a healthcare professional can suggest strategies, community resources, or further assessment.

When to seek medical care

Medical care is important if sundowners is new, worsening, or interfering with safety. A doctor should assess frequent wandering, falls, refusal of food or fluids, major sleep disruption, or behaviors that put the person or caregiver at risk. Even if symptoms seem to follow an evening pattern, there may still be a treatable medical cause.

Urgent evaluation is especially important if confusion comes on suddenly, fluctuates sharply, or is accompanied by fever, pain, shortness of breath, chest symptoms, weakness, new incontinence, or a major change in alertness. These features may suggest delirium or another acute illness rather than typical sundowning. Prompt care can improve outcomes by identifying reversible causes early.

Families should also ask for medical advice if they are unsure whether the person has dementia, if behavior changes are progressing, or if current strategies are no longer working. In some cases, assessment for related conditions such as sleep problems, depression, or other brain disorders may be helpful, including review by teams experienced in Alzheimer’s disease and cognitive decline.

Frequently asked questions

Is sundowners the same as dementia?

No. Sundowners is a symptom pattern, not a disease. It most often happens in people with dementia, but the evening worsening itself is not the same as the underlying diagnosis.

What time of day does sundowning usually start?

It commonly begins in the late afternoon or evening and may continue into the night. The exact timing varies, but families often notice symptoms as daylight fades or when daily routines shift toward dinner and bedtime.

Can sundowners happen without Alzheimer’s disease?

Yes. Although it is strongly associated with Alzheimer’s disease and other dementias, similar evening confusion can be worsened by poor sleep, infection, pain, medication effects, or hospital stays. A doctor can help determine whether dementia, delirium, or another problem is involved.

How is sundowners different from delirium?

Sundowners usually follows a repeated late-day pattern, often in someone with known memory or thinking problems. Delirium is a sudden change in attention and awareness that can occur at any time and is often caused by an acute medical issue, so it needs prompt evaluation.

Do medications always help sundowning?

Not always. Many people improve most with non-drug measures such as structured routines, better lighting, sleep support, and treatment of pain or infection. Medicines may be used selectively when symptoms are severe or dangerous, but they require careful medical supervision.

What can caregivers do during an episode?

A calm, reassuring approach is usually most helpful. Reducing noise, turning on lights, offering comfort, checking for hunger, pain, or toileting needs, and avoiding arguments can help the person settle more safely.

References

• National Institute on Aging
• Alzheimer's Association
• Centers for Disease Control and Prevention
• American Academy of Neurology
• World Health Organization

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.