Sundowning: What Houston Families Need to Know

As the sun goes down, confusion, anxiety, and agitation go up. If the person in your care becomes restless, argumentative, or tries to leave the house in the late afternoon or evening, they are likely experiencing sundowning, one of the most common and exhausting aspects of dementia caregiving.

Sundowning affects up to 66% of people living with Alzheimer’s disease and other forms of dementia. It typically worsens as the disease progresses, and it happens precisely when everyone in the household is already tired from the day.

What Sundowning Actually Looks Like

Families often describe it before they have a word for it. The pattern usually starts somewhere between 3pm and 6pm and runs for one to four hours. What you see:

- Pacing, or repeatedly checking doors and windows

- Insisting it’s time to "go home" while standing in the home they have lived in for thirty years

- Looking for a parent, a spouse, or a child who is long deceased

- Rummaging, packing bags, folding and refolding

- Sharp irritability over something small, out of proportion to anything that happened

- Refusing dinner, refusing a shower, refusing the person they were fine with at noon

- Shadowing — following you from room to room, unable to be left alone for two minutes

It is not deliberate. It is not aimed at you. And it is not the person "getting worse" permanently just because tonight was bad.

What Causes Sundowning?

Researchers believe sundowning is caused by a combination of factors:

Circadian rhythm disruption. Dementia damages the brain’s internal clock, the suprachiasmatic nucleus. As light fades, the brain loses its primary orientation cue, triggering confusion and anxiety.

Accumulated fatigue. By late afternoon, cognitive reserves are depleted. The brain has worked all day to process information through damaged neural pathways. Evening is when it can no longer compensate.

Environmental triggers. Shadows lengthen. Lighting changes. The house becomes darker. Television sounds more chaotic. Visitors may arrive. All of these sensory changes can trigger disorientation.

Unmet physical needs. Hunger, thirst, pain, a full bladder, needs the person may no longer be able to identify or communicate can manifest as agitation during sundowning hours.

Medication timing. A dose of a cholinesterase inhibitor or a diuretic landing at the wrong hour, or the tail end of a morning sedative wearing off, can line up with the bad window. So can caffeine after noon.

The household’s own pattern. Late afternoon is when the family caregiver is most depleted, when adult children call, when the news goes on, when the aide leaves. Some of what looks like sundowning is the house getting louder and less patient at exactly the wrong hour.

Is It Sundowning, or Is It Something Else?

This is the distinction I care most about, because getting it wrong delays real medical treatment.

Sundowning is a pattern. It recurs, at roughly the same time, over days and weeks, and the person returns to their usual baseline in between. If any of the following is true, treat it as a medical problem until proven otherwise:

It started suddenly. A person who has never sundowned and is now agitated every evening for the past four days is more likely delirious than sundowning. Urinary tract infection is the most common cause in older adults, and it often presents with no fever and no burning — just confusion.

Baseline has changed, not just the evenings. If mornings are also worse, this isn’t a circadian problem.

There is new physical illness, a recent fall, constipation, or a new medication. All four cause agitation that mimics sundowning.

Hallucinations came first, and they are visual and detailed. Seeing people or animals early in the disease, with alertness that swings hour to hour, points toward Lewy body dementia. That changes the medication conversation significantly — see our breakdown of [Alzheimer’s versus dementia and the other types](/blog/alzheimers-vs-dementia-what-houston-families-should-know/).

There’s pain nobody has assessed. Arthritis, a pressure area, dental pain, an untreated fracture. People who cannot say "my hip hurts" show you instead, and late afternoon is when their tolerance runs out.

Call the physician the same day for any of these. Go to the emergency department for a sudden change with fever, a fall with a head strike, chest pain, new weakness on one side, or agitation severe enough that the person or someone else is at risk of harm. Houston Methodist, Memorial Hermann, Baylor St. Luke’s, and HCA Houston Healthcare all have emergency departments, but call ahead where you can — an ER is close to the worst possible environment for a person with dementia, and the wait itself will make the confusion worse.

Keep a Fourteen-Day Log First

Before changing anything, write things down for two weeks. One line per day is enough:

- What time the agitation started and what time it ended

- What the person was doing in the 60 minutes before it began

- What they had eaten and drunk since lunch, and the last time they used the bathroom

- What the lighting and noise in the room were like

- What you tried, and whether it helped

Almost every family that does this finds a trigger they didn’t know about. A 4pm television news hour. A grandchild’s daily visit. A skipped afternoon snack. A bathroom trip that wasn’t happening. The log is also the single most useful thing you can hand a neurologist, because it converts "the evenings are bad" into data a physician can act on. Our [dementia sundowning playbook](/guides/dementia-sundowning-playbook/) includes a printable version of this log.

What Helps During Sundowning

Maintain a consistent daily routine. Predictability reduces anxiety. Meals, activities, and rest at the same times each day provide structure the brain can rely on.

Increase lighting in the late afternoon. Don’t let the house get dark as the sun sets. Bright, warm lighting can delay or reduce sundowning episodes. Consider full-spectrum light therapy in the early afternoon.

Limit caffeine and sugar after noon. Both can increase agitation and disrupt sleep, making the following evening worse.

Encourage physical activity earlier in the day. A morning walk, gentle exercises, or gardening can help expend energy and improve sleep quality.

Play familiar, calming music. Music from the person in your care’s young adult years can be remarkably calming. It activates memory pathways that dementia has not yet affected.

Reduce stimulation as evening approaches. Turn off the television. Limit visitors. Lower the volume of conversations. Create a calm, quiet environment.

Speak slowly, calmly, and with simple sentences. During a sundowning episode, the person in your care’s ability to process language is at its lowest. Short, reassuring phrases work better than explanations.

Move the hard tasks out of the window. Bathing, dressing changes, medical appointments, and anything requiring cooperation should happen in the morning. Fighting a shower at 5pm is a fight you will lose twice.

Offer a real job. Folding towels, sorting mail, drying dishes, snapping beans. Purposeful, repetitive, familiar activity in the late afternoon absorbs restlessness better than any distraction.

Feed and water before the window opens. A protein snack and a glass of water at 3pm prevents a surprising share of 5pm episodes.

A Houston-Specific Note on Light

Houston’s long, bright summer evenings and the shift off daylight saving time both matter more than families expect. When the clocks change in November, sunset moves an hour earlier overnight and episodes that used to start at 6pm start at 5pm — a change that reads as sudden decline and usually isn’t. Plan for it.

The other local issue is glare and blinds. Houston houses are built to keep heat out, which means heavy window coverings and rooms that go dim early. Walk the route from the living room to the bathroom at 5pm with the lights as they normally are. Look for pooled shadows, dark hallways, mirrors (reflections are frequently mistaken for an intruder), and shiny floors that read as water. Fix those before you fix anything else.

What Doesn’t Help

Arguing or trying to reason with someone who is sundowning is counterproductive. They cannot logic their way out of a neurological event. Asking "don’t you remember?" causes frustration and shame. Raising your voice, even out of exhaustion, escalates agitation. Physically restraining them increases panic.

Three more that families land on with the best intentions:

Long explanations. "You are home, this is your house, we bought it in 1987" gives the brain more to process than it can handle. Try "I’m here. You’re safe. Let’s sit down."

Correcting the reality. If she is waiting for her mother, telling her that her mother died in 1994 makes her grieve fresh every time. Meet the feeling: "You miss her. Tell me about her."

Reaching for medication first. Antipsychotics carry real risk in older adults with dementia and are specifically hazardous in Lewy body disease. Sometimes they are the right call — after environmental interventions have genuinely been tried and documented, and only with the prescribing physician.

The goal during sundowning is not to fix the behaviour. It is to keep the person in your care safe, calm, and accompanied until the episode passes.

When to Consider Professional Memory Care at Home

If sundowning is happening daily, if it’s disrupting sleep for the entire household, if the person in your care has become a safety risk during episodes (trying to leave, turning on the stove, becoming aggressive), or if you as the family caregiver are reaching your physical and emotional limit, professional memory care support can transform the situation.

A trained caregiver who understands sundowning can maintain the calming routines, manage the environment, redirect anxiety with patience, and give you the break you need during the hardest hours of the day.

The practical version is narrower than most families assume. You often do not need round-the-clock cover. You need the window covered. Our minimum visit is four hours, which maps cleanly onto a 3pm–7pm shift: the caregiver arrives before the agitation starts, runs the light and snack and activity routine, holds the evening through dinner, and leaves the household intact. Our weekly minimum is 20 hours, so five afternoons a week fits exactly.

At Homewatch CareGivers of Houston Galleria, our memory care programme is led by a registered nurse with Neuro ICU experience. Our caregivers receive specialised dementia training that goes beyond basics, because sundowning requires skill, not just presence. Everyone is a W-2 employee, background-checked and supervised, under HHSC licence #023721, with zero substantiated complaints since 2017.

Frequently Asked Questions

Does sundowning ever go away?

The pattern usually changes rather than disappearing. Many families see it peak in the middle stage and ease in the late stage as overall activity declines. That isn’t improvement, and it shouldn’t be read as one. In the meantime, good environmental management genuinely shortens and softens episodes.

Is sundowning worse in some types of dementia?

It is most associated with Alzheimer’s disease, but evening agitation occurs across types. In Lewy body dementia the fluctuation can look similar and is often worse, with hallucinations layered in — which is exactly why naming the type matters before anyone reaches for a sedative.

Should we try melatonin?

Ask the prescribing physician first. Evidence for melatonin in dementia-related sundowning is mixed, and it interacts with other medications. Bright light exposure in the morning and early afternoon has better support and no interaction risk, so start there.

My mother is fine when the doctor sees her. How do I get taken seriously?

Bring the log. Fourteen days of time-stamped entries carries far more weight than a description, and it removes the "she seemed fine to me" problem entirely. A caregiver’s shift notes do the same job with more consistency.

What does overnight coverage cost if the episodes run into the night?

Awake overnight care runs $320–500 per night in 2026, dementia-rated daytime care is $38–48 per hour, and 24-hour rotating cover is $650–850 per day. Most sundowning families start with afternoons only. Full detail is on our [dementia care pricing page](/pricing/cost-of-dementia-care-houston/).

Do you serve my part of Houston?

We cover the Galleria, River Oaks, Memorial, Tanglewood, West University, Bellaire, the Texas Medical Center corridor, and north through The Woodlands, Spring, Cypress, Conroe, and Tomball. We do not currently serve Katy, Sugar Land, League City, Pearland, or Humble.

If your family is managing sundowning, call us at 713-766-0908 for a free consultation. A Care Manager will walk your home at the hour the episodes actually happen — not at 10am — and build the plan around what we see. Our [neuro-aware dementia care programme](/programs/neuro-aware-dementia-care/) takes it from there.