If a loved one with dementia becomes more confused and agitated as the afternoon progresses, you are not imagining it and you’re not alone. This pattern, known as sundowning dementia, is common, and understanding its cause is a crucial first step to handling it more calmly.
This guide looks at what is actually going on during sundowning, the triggers worth watching for, and practical ways to make evenings feel steadier for everyone involved. Understanding sundowning dementia patterns will not make them disappear entirely, but it does make them far less frightening to face.
What Is Late Afternoon Agitation in Dementia?
Late afternoon agitation in dementia, commonly called sundowning, refers to a pattern of increased confusion, restlessness, or distress that tends to build in the late afternoon or evening and can continue into the night. It affects a significant number of people living with dementia, though not everyone experiences it, and it can vary a lot from person to person.
The exact cause is not fully understood. The leading theory points to disruption in the brain’s internal clock, the circadian rhythm that normally regulates sleep and wake cycles, combined with dementia-related changes in the parts of the brain that manage emotion and behaviour. Our guide to the stages of dementia covers how these broader brain changes tend to progress over time.
It is worth saying plainly that there is no single proven fix, and research in this area is still developing. What follows are widely recommended, practical approaches rather than a guaranteed solution, and what helps will vary from person to person.
Common Sundowning Triggers to Watch For
Sundowning triggers are not identical for everyone, but some patterns come up repeatedly. Simple tiredness by the end of the day is one of the most common, since fatigue tends to make confusion and agitation worse across the board.
Environmental changes matter too: fading light, longer shadows, and a shift to artificial lighting can all be disorienting. Physical discomfort is another major factor, particularly pain, constipation, or an infection like a urinary tract infection, since a person who cannot clearly express what is bothering them may show it through agitation instead. Some dementia medications can also affect sleep quality, and a change in routine or environment, including something as significant as a move into residential care, is a well-known trigger in itself.
Keeping a simple note of what happened in the hours before an episode, meals, activities, visitors, noise levels, can help identify a pattern specific to your own family member over time.
Building a Steady Evening Routine for Dementia
A consistent evening routine for dementia tends to help more than almost anything else, simply because predictability reduces the amount of new information a struggling brain has to process. Keeping wake times, meals, and bedtime roughly the same each day gives the whole system something steady to work with.
Scheduling more demanding activities, like appointments, outings, or bathing, earlier in the day when someone is naturally more alert can prevent a lot of late-day overwhelm. A larger lunch with a lighter dinner, along with discouraging long afternoon naps, are both small adjustments many families find genuinely helpful over time.
Lighting and Sleep in Dementia Care: Why It Matters
Lighting and sleep in dementia care are more closely connected than many people expect. Getting outside into natural daylight during the day helps support the body’s circadian rhythm, which can make the transition into evening feel less jarring.
As the day winds down, gradually increasing indoor lighting before it gets dark, rather than letting a room slide suddenly into shadow, tends to reduce disorientation. Cutting back on evening stimulation generally helps too: a loud television, an unfinished chore, or a burst of exciting activity right before bed can all add fuel to an already difficult time of day.
Calming Someone During Sundowning: In-the-Moment Strategies
Calming someone during sundowning starts with your tone as much as what you say. Staying calm yourself, even when the situation feels tense, sends an important signal, since a person with dementia often responds to emotional tone long after they have lost track of the specific words being used.
Avoid arguing or trying to reason someone out of a confused or distressing belief in the moment. Gentle reassurance, a familiar object, quiet background music, or simply redirecting attention to something soothing often works better than logic. Our dementia care team is trained specifically in these kinds of calming, trauma-informed approaches.
When to Check for a Medical Cause
If sundowning suddenly appears or noticeably worsens, it is always worth ruling out a medical cause before assuming it is simply progression. Pain, infection, constipation, dehydration, and medication side effects can all present as increased evening agitation.
Never adjust or stop a medication without speaking to a doctor first, even if you suspect it is contributing to the problem. A GP or geriatrician can help determine whether something treatable is behind a sudden change, and ruling this out early can save weeks of unnecessary guesswork at home.
How My Evervale Can Help
At My Evervale, we understand how exhausting sundowning dementia can be, not just for the person experiencing it but for the family supporting them day after day. Our dementia-trained team can help build a calmer, more predictable routine, and our respite care options give family carers a genuine break when they need one most.
If evenings have become a genuine struggle for your family, make a referral and our care coordinators will talk through what support could look like for you.