When sleep changes: what's worth noticing about a night

Understanding the change · 1 September 2026 · 5 min read
A woman asleep in bed in soft morning light

"I'm not sleeping" is one of the most common things said about the change, and one of the least useful things to walk into an appointment with. Not because it isn't true — because a broken night comes in several quite different shapes, and which shape it is turns out to matter.

Sleep is often the first thing to shift, and often the thing that quietly makes everything else harder. But sleep gets described in shorthand. A fortnight of very different nights becomes one flat sentence, and the detail that would have made the picture clear is the part that got compressed out.

The same complaint, four different nights

Consider how differently these read, and how similarly they tend to get reported:

All four get said as "I'm not sleeping." They are not the same night. A practitioner listening carefully will want to know which one it was, whether it is one of them or several, and whether that has changed over the last few months.

"I'm not sleeping" is a summary. What was actually happening at three in the morning is information.

Why a record beats remembering

Memory is unkind about sleep in a particular way: the worst night of the month tends to stand in for the whole month. Ask anyone how they slept in July and the answer will be shaped by the two nights bad enough to remember. A short note made in the morning is not a better memory — it is a different kind of record altogether, one that includes the ordinary nights as well as the memorable ones.

Over a few weeks that starts to show things a memory cannot hold. How many nights out of thirty. Whether they cluster. Whether it is easing or building. Whether the difficult nights sit anywhere near the rest of the month's pattern.

What is worth jotting down

Very little, and roughly is fine. Precision is not the point — presence is.

That is enough. A few weeks of it turns a vague account into a specific one, and specific is what a short appointment can actually use. Our piece on how flushes, sleep and mood travel together covers what happens when you can see all three side by side, and what to note before an appointment covers taking it in.

Threshold is not a diagnostic tool, and not a substitute for a doctor or practitioner. It helps you notice and remember — the rest is a conversation for you and your GP or health practitioner. If something feels urgent or severe, seek medical advice promptly.

A note in the morning.

Threshold's daily notes take a few seconds and build the picture quietly in the background — no streaks, no scores, nothing to keep up with.

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