The Caring Corner®

Navigating the Shadows: Understanding Sundowning in Older Adults

July 7, 2026

If you are caring for a loved one with Alzheimer’s or another form of dementia, you might notice a striking shift in their behavior as the afternoon fades into evening. A family member who was calm and cooperative at breakfast might become anxious, agitated, or deeply confused by dinner time.

If this sounds familiar, you aren’t alone, and your loved one isn’t doing this on purpose. You are witnessing a phenomenon known as sundowning.

What is Sundowning?

Sundowning (sometimes called sundown syndrome) is not a disease itself. Instead, it is a group of symptoms—including confusion, anxiety, aggression, and pacing—that emerge or worsen during the late afternoon and evening hours.

According to the Alzheimer’s Association, it affects up to 20% of people living with Alzheimer’s, though it can occur in individuals with other forms of dementia or cognitive decline as well.

Common Signs to Look For

  • Mood shifts: Sudden irritability, anxiety, suspiciousness, or intense mood swings.

  • Restlessness: Pacing, wandering, rocking in a chair, or fidgeting with clothing.

  • Verbal disruption: Repeating the same questions, yelling, or crying out.

  • Disorientation: Becoming unsure of where they are, what time it is, or who familiar family members are.

Why Does It Happen?

Scientists are still working to pinpoint the exact cause of sundowning, but it is generally thought to be tied to a disruption in the body’s internal biological clock (circadian rhythm). For a person with dementia, brain changes can scramble the signals that dictate when to be awake and when to sleep.

Other common “triggers” that make sundowning worse include:

  • End-of-day fatigue: Pure physical and mental exhaustion from trying to navigate a world that feels confusing all day.

  • Changing light: Shadows casting strange shapes in the room, or low lighting making it harder to see clearly.

  • Subconscious cues: Seeing family members cook dinner or get ready for after-work routines can trigger a restless feeling that they “need to go home” or “need to get to work.”

  • Physical discomfort: Unmet needs like hunger, thirst, pain, or a full bladder that they can no longer easily articulate.

4 Practical Strategies for Caregivers

While you cannot always prevent sundowning entirely, you can take predictable steps to minimize its impact and bring comfort to your loved one.

1.Establish a strict daytime routine: Morning to Mid-afternoon.

Keep waking times, meals, and activities at the exact same time every day. Predictability builds a sense of safety. Encourage physical activity and exposure to natural sunlight early in the day to help regulate their internal clock.

2.Control the environment early: Late Afternoon (around 3:00 or 4:00 PM).

Before the sun actually goes down, close the blinds and turn on bright overhead lights. This eliminates confusing shadows and minimizes the visual cue that night is falling. Turn off loud televisions or confusing background noise, replacing them with soothing music.

3.Adjust eating and sleeping habits: Evening.

Keep evening meals relatively light, and limit caffeine, large amounts of sugar, and liquids close to bedtime. Avoid daytime naps that last longer than 20–30 minutes, as long afternoon sleep will worsen nighttime wakefulness.

4.Respond with validation, not logic: During an episode.

If an episode triggers, do not argue or try to correct them with facts (e.g., trying to logically prove they are home). Instead, validate the feeling behind the words. Say things like, “You are safe here, and I’m right here with you.” Gently pivot their attention to a comforting distraction, like a favorite snack or a familiar photo album.

Take Care of Yourself, Too

Caring for someone who experiences sundowning is incredibly draining. The end of the day is often when your energy is lowest, making intense behaviors even harder to handle.

Remember that your safety and well-being matter just as much as theirs. If the evening hours are becoming overwhelming, look into local respite care, ask another family member to take an evening shift, or speak to your loved one’s doctor about medical options that might help stabilize their sleep-wake cycles.

A Quick Reminder: Sundowning is a medical reality of cognitive decline—not a behavioral choice. Take a deep breath, control what you can in their environment, and meet them with reassurance.

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