Sundowning: When Alzheimer’s Gets Worse at Night

If you’re caring for someone with Alzheimer’s, you may have noticed that their symptoms seem to worsen later in the day. The late afternoon and evening can bring a noticeable shift; more confusion, more agitation, more repetition, and sometimes behaviors that feel almost surreal.

This pattern is often called Sundown Syndrome, or simply “sundowning.”

I’ve seen it firsthand with my own mom, and understanding it has helped me respond with more patience and less panic.

What Is Sundown Syndrome?

Sundown Syndrome refers to a group of symptoms that appear or intensify in the late afternoon, evening, or nighttime in people with Alzheimer’s or other forms of dementia.

It’s not a separate disease. It’s a behavioral pattern linked to how dementia affects the brain’s ability to regulate:

• Circadian rhythm (sleep-wake cycles)
• Perception of light and time
• Emotional regulation
• Cognitive processing

As daylight fades, the brain can struggle even more to interpret surroundings and maintain clarity.

Typical Symptoms of Sundowning

While it looks different for everyone, common symptoms include:

• Increased confusion
• Heightened anxiety or restlessness
• Irritability
• Pacing or wandering
• Repeating questions more frequently
• Difficulty communicating
• Delusional or illogical statements
• Trouble distinguishing dreams from reality
• Sleep disturbances

For caregivers, it can feel like a switch flips around 4–7 PM.

What I’ve Observed With My Mom

With my mom, the change isn’t always dramatic—but it’s noticeable.

1. Increased Repetition

She begins repeating herself much more often in the evening. The same question, the same comment, sometimes within seconds of having just said it.

It’s as if her short-term memory loop tightens even further as the day winds down.

2. Harder Time Finding Words

Her word-finding struggles become more pronounced. She starts to say something, but pauses longer and can’t put the words together.

In the mornings, she might struggle a bit. In the evenings, it becomes far more difficult for her to communicate clearly.

3. Saying Things That Make No Sense

This is the hardest part.

She’ll make statements that are disconnected from reality – random, fragmented thoughts that don’t follow any logical thread. I wrote some examples of these in my Odd Behaviors post. And what’s striking is that she seems completely unaware that what she’s saying doesn’t make sense.

There’s no self-correction. No hesitation.

The Dreamlike State

The best way I can describe it is this:

It feels like she’s in a dreamlike sleepwalking state.

She appears fully awake. Her eyes are open. She’s talking. She’s responding.

But the content of what she says can feel like something pulled from a dream – disconnected, illogical, floating.

It’s almost as if:

• Her body is awake
• But part of her brain has started to drift off into dreamland

And she doesn’t realize it.

There’s something both unsettling and heartbreaking about watching someone you love exist in that in-between space.

Why Does Sundowning Happen?

Researchers believe several factors contribute:

• Fatigue: The brain simply becomes exhausted after processing stimulation all day.
• Low light: Shadows can distort perception and increase confusion.
• Disrupted internal clock: Alzheimer’s damages areas that regulate sleep cycles.
• Overstimulation: Too much activity during the day can lead to overload.
• Hormonal changes: Changes in melatonin and cortisol levels affect evening behavior.

Think of it like cognitive reserves running low. When the brain’s energy dips, symptoms intensify.

The Emotional Side for Caregivers

Sundowning can be one of the most emotionally draining parts of caregiving.

It’s hard to watch someone slip into confusion in real time.

It’s hard to hear statements that don’t make sense and know they don’t realize it.

It’s hard to feel like you’re losing the clearest version of them as the day fades.

And, the constant repeating can really test your patience and be exhausting.

But understanding that this is neurological, not intentional, changes how you respond.

It’s not stubbornness.
It’s not personality.
It’s not defiance.

It’s the disease.

Final Thoughts

If your parent seems “more gone” in the evenings, you’re not imagining it.

Sundown Syndrome is real. It’s common. And it can feel deeply unsettling.

For me, recognizing that my mom’s evening confusion isn’t something she’s choosing, but something her brain can no longer regulate, has helped me show up with more patience.

Even when it feels like she’s walking through a dream.

If you’re experiencing something similar with your parent, you’re not alone.