Sundowning in Aging Parents: What Actually Helps

Your dad is fine at breakfast. Maybe a little slow to find his words, but fine. By four-thirty in the afternoon, something has shifted — he's restless, anxious, maybe convinced he needs to be somewhere he hasn't been in decades. You're exhausted. He's distressed. And tomorrow morning he may not remember any of it. If this pattern sounds familiar, you are not imagining it, and you are not alone. What you're describing has a name: sundowning. And once you understand what's driving it, you actually have more tools than you might think.

What Sundowning Actually Is

Sundowning isn't a standalone diagnosis. It's a cluster of symptoms — confusion, agitation, restlessness, sometimes fear or anger — that tend to peak in the late afternoon and early evening. It's most common in people living with Alzheimer's or another form of dementia, though it can also appear in older adults who are significantly sleep-deprived or reacting to certain medications. What makes it so disorienting for families is the contrast: the same person who was coherent and conversational at ten in the morning can seem like a different person by dinnertime. That whiplash is real, and it's exhausting.

Why It Happens

Researchers are still working out the full picture — and it's worth being honest about that uncertainty. The most well-supported explanation points to the brain's internal clock, the circadian rhythm. In people with dementia, that clock gets disrupted. The brain struggles to process the transition from daylight to darkness, which is disorienting even in a healthy brain and genuinely threatening when the brain is already working hard just to interpret its surroundings. Add in the cognitive fatigue that builds throughout a full day of compensating for what dementia is taking away, and late afternoon becomes a kind of perfect storm. Shadows appear. The environment shifts. The brain — already strained — reads those changes as something to be afraid of.

What Genuinely Helps

Here are five things that have made a real difference for families, grounded in what the research supports and what caregivers actually report.

• Bright light during the day. Regular exposure to natural light — a morning walk, sitting near an open window, or a light therapy lamp — may help reinforce the brain's sense of daytime and reduce the severity of late-day symptoms. If your mom Margaret spends most of her day in a dim room, simply opening the blinds is a low-effort place to start.
• Consistent daily routine. A brain working hard to compensate for dementia benefits enormously from predictability. When dinner happens at the same time, when the same music plays at the same transition point in the evening, there are fewer surprises to process and less anxiety to manage.
• Calm, low-demand afternoons. This one surprises many families: trying to keep a parent busy and engaged through the difficult hours can actually backfire. By four o'clock, someone with dementia may be genuinely fatigued. Folding towels, listening to music from their youth, or quietly looking through old photos tends to be more soothing than conversation-heavy activities.
• Unhurried human connection. A calm, familiar voice — someone who isn't rushed, who's just present — can do more than most people expect. Anxiety is contagious, and so is calm. A check-in call timed just before the sundowning window, for example, can help a parent feel less alone during the hardest part of the day.
• A conversation with their doctor. If sundowning is severe or getting worse, a physician needs to know. Some medications help; others — including certain over-the-counter sleep aids — are known to increase confusion in older adults. This is not a conversation to skip.

What to Stop Doing

Two common instincts tend to make things worse, not better. The first is correcting. If your mom is convinced at six in the evening that she needs to pick up her kids from school — kids who are now in their fifties — arguing her out of it will almost never work. Her brain is telling her something that feels completely real. Redirecting gently is far more effective than correcting directly. The second is overstimulation: loud TV news, a chaotic dinner table, multiple people talking at once. These amplify disorientation rather than soothe it. Quieter, softer, slower is almost always the right direction as the afternoon winds down.

A Honest Word About How Hard This Is

Sundowning is one of the most exhausting parts of caring for an aging parent — not just because the episodes themselves are difficult, but because they happen at the end of the day when you're already depleted. And because your parent may wake up the next morning with no memory of the evening at all, even when you're still carrying it. You are holding something real. The fact that you're trying to understand it, trying to find what actually helps — that is not a small thing. Daily phone check-in services like Call Mabel (callmabel.com) are designed to put one more warm, consistent voice in your parent's corner — not to replace you or their care team, but to offer the kind of calm, unhurried presence that makes a real difference, especially in those difficult late-afternoon hours. Plans start at under $30 a month.