Sundowning: what to do when the day turns.

What sundowning actually is

Sundowning is the name given to a pattern of increased confusion, agitation, anxiety, or aggression in people with dementia that appears in the late afternoon or early evening. It is not a diagnosis — it's a symptom cluster common to Alzheimer's, Lewy Body, vascular, and frontotemporal dementia. Roughly 20% of people with dementia experience it at some point in their disease course; among people in mid-stage Alzheimer's, the number is higher.

The reason it matters to families is practical: sundowning is when a home stops feeling safe. A parent who was placid at lunch is anxious at 5 pm, angry at 6 pm, and by 8 pm the family is exhausted, the caregiver is second-guessing themselves, and someone is quietly Googling assisted-living facilities. Most of the time, that's the wrong response. Sundowning is one of the most manageable symptom clusters in dementia — if you treat it as a predictable environmental phenomenon and not as a personality change.

Why it happens

No single mechanism causes sundowning; six overlapping factors do. If a family names all six and works down the list, most sundowning episodes shrink within a week.

The 4 pm checklist

Print this. Tape it inside a cupboard door. Run it every day at 4 pm for two weeks and most families see their evenings change. The order matters — each step reduces the load on the next.

1. Draw the curtains and turn on warm lamps BEFORE the light actually fades. Beat the transition, don't chase it.
2. Small protein snack: cheese, nut butter on toast, or a hard-boiled egg. Skip anything caffeinated after 2 pm.
3. Bathroom trip, even if unprompted. Then ibuprofen or Tylenol if arthritis is in the picture.
4. Turn the TV off. Put on familiar quiet music from their era (1940s-60s standards work for most people 75+).
5. One calm activity ready to hand: folding towels, sorting cards, wiping the kitchen table. Something with a beginning and an end.
6. Move to the room with the best natural evening light. If that room is upstairs, do it earlier in the day.
7. Reduce family traffic in and out of the house between 4 and 7 pm. If grandchildren are visiting, plan the visit for the morning.

Four environmental fixes that carry the rest

If you only do four things this week, do these four. Lighting is not a soft intervention — it's the single most-effective environmental change in the sundowning research literature.

When it's not (just) sundowning

Sundowning that responds to the checklist is a management problem. Sundowning that appears suddenly, escalates fast, or comes with new symptoms is a medical problem. Watch for these:

• New sundowning that started this week (not a gradual pattern) — call the primary care physician within 24-48 hours. A urinary tract infection, medication change, or minor stroke can present as sudden sundowning in older adults.
• Aggression escalating week over week — needs a Care Manager assessment. Some medications (sedatives, sleep aids, some blood pressure drugs) make sundowning worse.
• Wandering that reaches the front door or car keys — install a door alarm and remove the keys from the visible environment. This is a safety issue, not a behavior issue.
• Family caregiver reporting they haven't slept a full night in more than a week — the family caregiver is now the patient too. Read our caregiver-burnout guide.
• New-onset visual hallucinations (seeing children, animals, deceased relatives) — likely Lewy Body dementia if this is a repeated pattern. Different medications, different care plan.

What a Homewatch caregiver actually does at 4 pm

Every dementia care plan we write starts with an assessment of when sundowning begins and what it looks like in this specific person, because two people with the same diagnosis often sundown for different reasons. Our caregivers are trained to run the checklist above without prompting, to document the antecedents (what happened in the 30 minutes before), and to escalate to the Care Manager (a nurse) if a new pattern appears. The goal is a calm evening — for the person we care for, and for the spouse or adult child who otherwise faces that hour alone.

If afternoons at your parent's or partner's home are getting harder, a free in-home care consultation is the fastest way to know whether the current plan is working or whether it needs a rethink. A Care Manager (former Neuro ICU nurse) visits, walks the home, watches the 4 pm window, and writes a plan.