What Is Sundowning? Signs, Triggers, and How to Manage It

If a parent with dementia becomes restless, confused, or upset as the afternoon fades into evening, you are seeing something with a name: sundowning. It can be one of the harder parts of the day, and it is exhausting for the caregiver too. The reassuring news is that a few practical changes often help.

Here is what sundowning is, why it happens, and how to make late afternoons and evenings calmer for everyone.

What is sundowning?

Sundowning, also called sundowners, sundowners syndrome, or sundown syndrome, is a pattern of increased confusion, restlessness, anxiety, or agitation that appears in the late afternoon and evening in some people with dementia. In plain terms, it means a person becomes more confused or agitated as the day winds down. It is not a separate disease, it is a cluster of behaviours tied to the time of day.

Symptoms can include pacing, restlessness, irritability, suspicion, trouble settling, and sometimes wanting to leave or "go home" even when they are home. It often eases overnight and is gone by morning.

Why does sundowning happen?

The exact cause is not fully understood, but it is linked to the way dementia disrupts the body clock, along with the wear of a long day. Common triggers include:

• Fatigue by late afternoon, and too much daytime napping
• Low light and long shadows as it gets dark, which can confuse and unsettle
• A disrupted routine, or an over-busy, overstimulating day
• Hunger, thirst, pain, or needing the toilet that the person cannot easily express
• Too much caffeine or sugar late in the day

Knowing the triggers is useful, because most of them can be softened.

How to manage and reduce sundowning

Our honest guidance: aim for calm, predictable days and gentle evenings, and change one thing at a time so you can see what helps. Steps that often make a difference:

• Keep a steady daily routine, with meals, activity, and bedtime at consistent times.
• Let in daylight and stay active during the day, and limit long afternoon naps, so the body clock and natural tiredness work in your favour.
• Turn on lights before dusk and close curtains to reduce confusing shadows.
• Wind down in the evening: quieter activities, softer light, less noise and TV, and a calm presence.
• Head off unmet needs: offer a snack, a drink, and a toilet trip in the late afternoon, and watch for signs of pain.
• Limit caffeine, alcohol, and sugar later in the day.

If sundowning is severe or new, talk to the doctor. It can be worsened by medications, pain, infection (a urinary tract infection is a common culprit), or poor sleep, and those are treatable. Ask the doctor or pharmacist before trying supplements like melatonin, so the timing and dose are right for your parent.

When sundowning means more care is needed

Sundowning is tiring, and if the evenings have become unsafe or more than one person can manage, that is a signal, not a failure. Extra home care in the late afternoon and evening can cover the hardest hours, and our home care for dementia guide explains what specialized support looks like. If safety and supervision needs have grown, secured memory care is designed for exactly this.

A free Senior Care Path assessment can help you weigh the options, and our advisors are glad to talk it through at no cost.

The bottom line

Sundowning is a real, common pattern, not your parent being difficult, and it usually responds to calmer, more predictable days and gentle evenings. Rule out pain, infection, and poor sleep with the doctor, adjust the routine and the light, and get help for the hardest hours. You are not doing this wrong, and you do not have to do it alone.