She's Up All Night (Sundowning)

What May Be Happening Read

Before settling on sundowning as the explanation: check whether something physical is making tonight worse. Pain, a full bladder, hunger, or thirst often flare after dark and can look exactly like the pattern itself. Check that first.

Late-afternoon and nighttime agitation, commonly called sundowning, is one of the most disruptive patterns in dementia care because it targets the caregiver's own sleep along with the person's. The mechanism isn't fully understood, but it's tied to a disrupted internal clock, the part of the brain that once cued the body toward winding down as light fades no longer sends a clear signal. Fatigue accumulated over the day plays a role too, since a tired brain has less capacity to filter confusion and stimulation by evening. Reduced light can also make shadows and unfamiliar shapes in a dim room genuinely harder to interpret correctly, which can look like agitation but is really a perception problem.

Before treating this as a fixed pattern, rule out what might be making a specific night worse. Check whether pain, a full bladder, hunger, or thirst is going unaddressed, since these often intensify after dark simply because no one is checking as closely. Review medication timing, particularly anything with a stimulant effect scheduled too late in the day, and consider whether recent illness or a change in daytime routine has thrown off the evening pattern. A single unusually bad night is often explained by one of these; a consistent pattern over weeks is closer to the disease process itself.

What to Say Reach

What to Try Next

Start by adjusting the day rather than only managing the night.

1. Get natural light exposure earlier in the day if possible, since morning and midday light helps reinforce the body's sense of a day-night cycle.
2. Limit napping late in the afternoon, which can work against nighttime sleep even though it feels like relief in the moment.
3. Keep evening lighting warm and consistent rather than switching between bright and dark rooms, and reduce noise and activity as bedtime approaches.
4. If agitation peaks, offer a familiar, low-stimulation activity, folding a blanket, listening to familiar music, to redirect the anxious energy.
5. If nothing is working on a given night, prioritize safety over sleep, secure the space, stay nearby, and accept that this particular night may not resolve quickly.

Track which nights are worse and what came before them, a skipped nap, a late stimulant dose, a disrupted daytime routine. A pattern noticed across several nights tells you more than any single bad night can.

Staying steady here means measuring the night by whether everyone stayed safe and calm enough, not by whether sleep happened on schedule.

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