Is It Insomnia or Sundowning? What to Do When Your Loved One with Dementia Won’t Sleep

It’s late. The house is quiet. You have turned off the lights, offered a drink, tried a calm tone, and waited patiently. But your loved one is still awake. Restless. Maybe pacing. Maybe upset.

You start to wonder what is happening. Is this just poor sleep? Or is something deeper going on?

For many caregivers, nighttime becomes the most exhausting and confusing part of dementia care. Sleep disruption affects not only the person living with dementia but also the caregiver’s health, mood, and ability to function the next day. When nights become a repeated struggle, clarity matters.

Let’s walk through how to tell the difference between insomnia and sundowning, why it happens, and what you can do tonight to support better rest.

When Sleeplessness Is More Than Sleeplessness

Sometimes, trouble sleeping is simply that. Difficulty falling asleep. Waking in the middle of the night. Restless tossing and turning.

But in dementia care, patterns matter.

Sundowning refers to a predictable increase in confusion, restlessness, or agitation in the late afternoon or evening. It is not just psychological. It is rooted in neurological change.

Dementia alters the brain’s internal clock. The regions that regulate circadian rhythm and environmental cues become disrupted. As daylight fades, the brain may struggle to interpret surroundings accurately. Fatigue builds. Shadows lengthen. Sensory perception shifts. A person may misinterpret objects, feel unsafe, or experience heightened confusion.

At the same time, unmet physical needs can amplify distress. Pain, hunger, thirst, constipation, urinary discomfort, or medication side effects may intensify late in the day when reserves are low.

Understanding this shift changes how you respond. Instead of seeing behavior as resistance, you begin to see it as neurological vulnerability.

How to Tell If It Is Insomnia or Sundowning

Start by observing patterns.

If sleep disturbance is random, with some good nights and some difficult ones, you may be dealing with general insomnia.

If confusion or agitation increases consistently after dusk, especially as sunlight fades, that suggests sundowning.

If behavior includes pacing, increased questioning, irritability, shadow misinterpretation, or heightened anxiety in the evening hours, that further points toward sundowning.

Context is essential. Ask yourself:

Did a new medication start recently?
Has there been a recent illness?
Is there any sign of pain, fever, urinary symptoms, or sudden behavioral change?

A urinary tract infection, for example, can mimic or worsen sundowning. Sudden changes should always prompt medical evaluation.

When you pair pattern recognition with physical context, you move from guessing to informed leadership.

Steps You Can Try Right Away

Even when neurological changes are present, small environmental and routine adjustments can significantly soften evenings.

Daytime Light and Activity Matter More Than You Think

The brain’s sleep cycle is strongly influenced by daylight exposure. Morning natural light helps anchor circadian rhythm. If possible, expose your loved one to bright light early in the day. Open curtains. Sit near a window. Take a short morning walk.

Daytime movement also regulates nighttime sleep. Gentle walking, light household tasks, or structured engagement reduce excess daytime napping and support natural fatigue by evening.

Be especially mindful of late afternoon naps. Long or late naps often worsen nighttime wakefulness.

Think of daytime as preparation for night.

Shape the Evening Environment Intentionally

As evening approaches, shift stimulation gradually. Turn off loud television programs. Reduce bright screens. Avoid abrupt environmental changes.

Turn indoor lights on before it becomes fully dark to reduce sharp shadow contrasts. Use warm lighting and nightlights in hallways or bathrooms. Shadows can trigger fear or misinterpretation in dementia.

Consider lighter dinners and limit caffeine after midday. Heavy meals late at night can disrupt comfort and sleep.

Create a wind-down routine that becomes predictable. Familiar music. Quiet reading. Gentle hand massage. A calm, repeated pattern signals safety to the brain.

Consistency builds comfort.

When Restlessness Hits, Respond with Regulation

If agitation rises, your nervous system becomes part of the intervention.

Stay calm. Speak softly. Avoid arguing or insisting that it is time to sleep.

Instead, validate feelings. “I see you are upset. I am here with you.”

Offer gentle redirection. A warm drink. Folding a small towel. Looking at a familiar photo. Listening to soothing music. These small activities provide grounding without confrontation.

Always check physical needs. Bathroom. Thirst. Pain. Temperature. Many nighttime behaviors resolve when basic needs are addressed.

Track What You Notice

Keep a simple log. Write down when agitation starts, what preceded it, what seemed to help, and how long it lasted.

Patterns often reveal themselves. Perhaps confusion spikes when lighting shifts abruptly. Perhaps late meals correlate with worse nights. Perhaps overstimulating television content triggers anxiety.

Your observations are valuable clinical data. When you document patterns, you strengthen your ability to advocate effectively.

When to Involve the Medical Team

Sometimes, environmental adjustments are not enough.

Contact the medical team if:

Sleep disturbance appeared suddenly
There are signs of infection, fever, or pain
Medications changed recently
You suspect sleep apnea or another sleep disorder
Strategies consistently fail to reduce agitation

Bring your log. Share specifics. Describe timing and triggers. Ask whether medication adjustments or further evaluation are needed.

You are not overreacting. You are leading care responsibly.

The Emotional Toll of Sleepless Nights

Let us acknowledge something important. When your loved one cannot rest, neither can you.

Sleep deprivation affects mood, focus, patience, and health. Caregivers often carry guilt for feeling frustrated at night. But exhaustion is human. It does not mean you are failing.

You have already lost sleep. You have already carried more than your fair share.

The goal is not perfection. It is progress.

Every step you take, whether it is adjusting light exposure, creating routine, validating emotion, or documenting patterns, reduces the night’s intensity over time.

You are not powerless in this.

You are the one observing. The one adjusting. The one advocating. That is leadership.

Understanding the Brain Changes Everything

When caregivers understand how dementia affects the brain, behavior becomes less personal and less frightening.

Late-day confusion is not stubbornness. It is neurological fatigue. Agitation is often disorientation. Restlessness may be the brain searching for clarity.

Education transforms reaction into strategy.

If you want to deepen your understanding of how dementia changes thinking, emotion, and behavior, consider joining my free Brain Behind Dementia masterclass. Knowledge reduces fear and increases confidence.

Staying informed about evolving treatments and supports also matters. Dementia care continues to change, and staying current can help you make better decisions for your loved one.

But most importantly, remember this.

You are more than just a giver of care. You are a leader of care.

Leadership in caregiving does not require perfection. It requires observation, compassion, structure, and the courage to adjust when something is not working.

If this conversation resonates with you, I invite you to subscribe to our newsletter. Each week, I share practical tools, clinical insight, and steady encouragement to help you lead care with clarity and strength.

You do not have to navigate these nights alone.

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*Bio: Dr. Anna Thomas is a board-certified physician, TEDx speaker, workplace wellbeing strategist, and leadership coach who helps organizations strengthen culture, resilience, and performance in a changing world. As founder of LifeCare LeadHership and Workplaces That Care, she blends clinical insight with leadership development to teach practical tools for building supportive, care-ready workplaces. Her keynotes and trainings address workforce wellbeing, retention, burnout prevention, caregiving in the workplace, women’s leadership, and navigating life and work transitions. As the creator of the CARE Framework, she equips leaders to support the whole person so teams stay engaged, healthy, and committed. Audiences appreciate her grounded delivery, relatable stories, and clear, actionable strategies. Learn more or book Dr. Thomas at www.workplacewellbeingspeaker.com
The views and opinions expressed in this post are solely those of Dr. Thomas and do not reflect the views of any past or present employer. This content is for educational and informational purposes only and is not intended as medical or legal advice.