Sundowning: The Late-Day Confusion

a pattern with known fixes, not bad behavior

The sundowning map

Restlessness, confusion, and agitation that arrive with the evening are a pattern with known fixes: anchor the body clock early, calm the evening, and know the line where the doctor gets the call.

1. The patternEvening agitation is not a choiceChanging light and the day's fatigue trigger restlessness, irritability, and confusion late in the day. The person is not being difficult; the pattern is doing it.
2. Daytime fixesAnchor the clock earlyStick to a predictable routine, get daylight in the morning and early afternoon, and move appointments, baths, and demanding activities to the morning.
3. Evening fixesLess, not moreDim the light, cut caffeine and late sugar, quiet the music, fewer visitors, and a predictable wind-down signal. Do not argue, correct, or add stimulation to calm things down.
4. The doctor lineA sudden change is a callNew confusion that breaks the evening pattern, fever, pain, a fall, or a medication change: rule out infection or a drug reaction. Never assume a behavior change is just the dementia.

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What sundowning looks like

As daylight fades, some people living with dementia become restless, irritable, confused, or demanding. The National Institute on Aging describes it as agitation, aggression, and confusion that often happens late in the day, and notes that being overly tired can make it worse. The person is not choosing this; the changing light and the day's accumulated fatigue are part of the trigger.

The fixes that work

1. Stick to a schedule. A predictable daily routine for meals, walks, and rest reduces the surprises that feed confusion. NIA lists routine as a first-line step.
2. Get light early, dim it late. Daylight during the morning and early afternoon helps anchor the body clock. As evening approaches, reduce bright light and noise rather than adding stimulation.
3. Move the big activity earlier. Appointments, baths, and anything demanding should happen in the morning or early afternoon, not before bed.
4. Cut caffeine and late sugar. Both can feed evening restlessness. Offer a light snack instead of a heavy or sugary one.
5. Keep the evening calm. Quieter music, familiar faces, fewer visitors, and a predictable wind-down signal that bedtime is coming.

What not to do

• Do not argue, correct, or reason with the confusion; it will escalate. Redirect instead.
• Do not add new stimulation to calm things down. The goal is less, not more.
• Do not silently accept sudden or severe changes. A sudden worsening of confusion can be a medical problem: infection, pain, or a medication reaction.

When to call the doctor

Sundowning is common, but a sudden change in behavior is a reason to call the clinician: new confusion that does not follow the evening pattern, a fever, pain, a fall, or a change in medicines. The doctor can rule out treatable causes. Never assume a behavior change is just the dementia.

Related

• Talking with a parent who has dementia: the communication switches that work.
• When dementia changes personality: responding without the fight.
• Right after a dementia diagnosis: the first month in order.
• Medication management: the list that prevents the missed-dose and double-dose errors.

Sources

• National Institute on Aging: Coping with agitation, aggression, and sundowning in Alzheimer's disease (retrieved August 2026)
• National Institute on Aging: Alzheimer's changes in behavior and communication (retrieved August 2026)

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