Night-time symptoms, explained.

The problem with night-time symptoms

Every other part of the body you can observe while it misbehaves. The night is the exception: the thing you want to understand happens while you are unconscious, and the only evidence that survives until morning is indirect, a dry mouth, a headache, a sore throat, a heart that was already racing when you opened your eyes, or a partner's complaint.

That indirectness is why night symptoms get misattributed for years. A dry mouth is blamed on the heating rather than on breathing through an open mouth. Morning headaches are blamed on stress. Exhaustion after eight hours in bed is blamed on age. Each of those explanations is plausible, and each one is also what an unrecognised breathing problem looks like from the outside.

Three questions that sort most of it out

Before reading about any individual symptom, these three questions narrow the field faster than a list of possible causes:

1. Does it happen most nights, or occasionally? One bad night after a late meal or a glass of wine is noise. Something that happens four nights out of seven, for weeks, is a pattern, and a pattern is what a doctor can work with.
2. Does it involve breathing? This is the dividing line that matters most. Snoring, gasping, choking, witnessed pauses, waking with a pounding heart, a dry mouth and a morning headache all belong to the same family, and that family is worth taking seriously. Symptoms that do not touch breathing (talking, twitching on the way into sleep, teeth grinding, vivid dreams) are usually far more benign.
3. Does it cost you the next day? A quirk you only know about because someone told you is different from one that leaves you falling asleep at your desk. Daytime sleepiness is the symptom doctors weigh most heavily, because it is the one that shows the night is not doing its job.

Why a recording changes the conversation

Most of what is written about night symptoms assumes you already know what happens at night. Usually you do not, and neither, reliably, does your partner, who was also asleep and is recalling it through the filter of a bad night's rest. Studies comparing what people report about their own snoring with what a calibrated sound meter measures find the agreement barely better than chance once you account for luck.

This is the one area where a phone on the bedside table is genuinely useful: not to diagnose anything, but to replace a recollection with a recording. A timestamped sound, a curve showing when it happened and how often, and clips you can play back turn "I think I might snore" into something a doctor can actually work from, or reassure you with.

Every symptom, by what you noticed

The entries below are grouped by the kind of thing you observed, not by diagnosis, because the diagnosis is what you are trying to find out.