The advice that helps a chronic insomniac will not help a person whose insomnia started two weeks ago — and vice versa.
A Reddit thread on r/insomnia with 748 upvotes makes the point bluntly: "A lot of you need to accept that you are in different phases of insomnia than us — chronic insomniacs that have tried melatonin." Sleep medicine has known this since 1987. Public sleep advice still mostly hasn't caught up.
I. The model that organized the field
In 1987, Arthur Spielman, Lauren Caruso, and Paul Glovinsky published a short paper in Psychiatric Clinics of North America titled "A behavioral perspective on insomnia treatment." The paper is a workhorse — quietly cited a few thousand times — and its central contribution is the 3P model, a way of decomposing insomnia into three temporally distinct factors.
Predisposing factors. What you bring into the situation before insomnia starts: genetic load, baseline anxiety reactivity, perfectionist personality traits, hypervigilance. These don't cause insomnia on their own. They set the threshold at which a stressor triggers it.
Precipitating factors. The specific event that triggers acute insomnia: a death, a divorce, a job loss, a medical scare, a major life transition. In the absence of a strong predisposition, the same event might cause two weeks of poor sleep and resolve. With strong predisposition, it can fail to resolve.
Perpetuating factors. The habits that develop after insomnia begins, intended to cope with it, that paradoxically keep it going. Going to bed early to "make up for" lost sleep. Lying in bed for hours hoping sleep will come. Daytime napping. Excessive caffeine compensation. Increasing anxiety about sleep itself. The original precipitating event has often resolved by the time perpetuating factors take over — the insomnia, by then, has changed shape.
The 3P model's diagnostic power is that it predicts what kind of insomnia someone has based on how long they've had it.
II. Three phases, three different problems
Most sleep researchers now use a phase-based extension of the 3P model:
Phase I — Acute (days to ~3 weeks). Recently triggered by an identifiable stressor. The person knows what's wrong: "I can't sleep because my mother is in the hospital." Sleep returns when the stressor resolves or the person adapts. Spontaneous remission is common; clinical intervention is usually not warranted.
Phase II — Sub-acute / Short-term (3 weeks to ~3 months). The original stressor has resolved or stabilized, but sleep hasn't returned. Perpetuating factors are starting to develop. The person may begin to ruminate about sleep itself, develop bedtime anxiety, or change daytime habits in counterproductive ways. This is the highest-leverage window for behavioral intervention — habits are forming but not yet entrenched.
Phase III — Chronic (3+ months). Sleep difficulty has persisted across most weeks. Perpetuating factors dominate the clinical picture; the original precipitating event may not be retrievable. Self-help approaches that work for acute insomnia routinely fail here; the standard of care shifts to formal CBT-i, sometimes augmented with pharmacotherapy.
A 2024 study by Michael Perlis and colleagues in the Journal of Sleep Research — "The natural history of insomnia: Is the first the worst?" — examined symptom severity across these phases. The counterintuitive finding: acute-phase insomnia is, on average, more severe in the moment than chronic-phase insomnia. The chronic version is more disabling over time precisely because it lasts longer; per-night, however, the acute presentation is often the more dramatic one.
That finding has consequences for how to read advice. Someone going through their first sleepless week is in the most acute phase, and that experience — terrible as it feels — is in fact the phase with the best prognosis and the lightest required intervention. Most of the advice they encounter online, however, was written for chronic insomnia, where the entire framing changes.
III. Why 3P matters for choosing a response
A short translation of the model into practice:
Acute phase (Phase I): Most interventions are about damage limitation, not "treatment." Reduce daytime caffeine, maintain a roughly consistent wake time, accept that some bad nights will happen, avoid drastic behavioral overcorrection. Sleeping pills may be appropriate for a short course (under two weeks) under clinical supervision — long enough to bridge the stressor, short enough to avoid creating perpetuating factors. Sleep-hygiene checklists are at their most useful here, even though their evidence base in chronic insomnia is weak.
Sub-acute phase (Phase II): This is the window where stimulus control and basic sleep restriction principles can prevent transition to chronic. Two specific principles do the most work: only use the bed for sleep (not for reading, scrolling, anxiously waiting), and get out of bed if not asleep within ~20 minutes. These break the developing conditioned association between bed and wakefulness. Self-help can succeed at this phase; clinical CBT-i is a strong option but not always necessary.
Chronic phase (Phase III): Self-help largely doesn't. Multiple rigorously controlled trials (most recently the 2025 npj Digital Medicine meta-analysis of digital CBT-i, n > 20,000) show CBT-i as the first-line treatment, with effect sizes that persist at 6-month follow-up. Sleep medication used continuously becomes part of the perpetuating-factor problem rather than a solution. The thing chronic insomnia needs is structured behavioral retraining, not a better pill or a better app.
IV. Where most public advice gets stuck
Much of the most-shared sleep advice — sleep-hygiene checklists, "10 things you can do tonight to sleep better," wellness-app suggestions — is implicitly written for someone in Phase I or Phase II, with low predisposition, who will improve with mild intervention. That description fits a sizable fraction of casual readers, and the advice helps them.
The same advice given to someone in Phase III, with high predisposition and entrenched perpetuating factors, is at best ineffective and at worst counterproductive. The 1,993-upvote Reddit post titled "Sleep Hygiene is bullshit" (r/insomnia) is not wrong — it's just describing the chronic-phase view of advice optimized for the acute phase.
A more honest framing of "sleep hygiene" is necessary but not sufficient. Hygiene addresses many predisposing and acute precipitating factors. It does not address perpetuating factors. Telling a chronic insomniac to "stop drinking coffee after 2 PM" is like telling a chronic alcoholic to "drink water occasionally." Not wrong; not the relevant axis.
V. How to know which phase you're in
A rough self-assessment:
- How long has this been going on? Days? Weeks? Months?
- Can you identify what triggered it? A specific stressor, change, or event?
- Has the trigger resolved or changed? Or is it ongoing?
- Have you developed coping behaviors that you suspect aren't working? Going to bed earlier than feels natural; lying awake hoping for sleep; daytime napping; checking the clock; avoiding social events for fear of being too tired.
- How much of your day is spent thinking about sleep itself?
Rough phase mapping:
| Pattern | Likely phase |
|---|---|
| Started recently, clear trigger, trigger ongoing | Phase I (acute) |
| Trigger resolved but sleep hasn't returned, some new habits forming | Phase II (sub-acute) |
| Persistent for months, multiple coping strategies that don't work, sleep is a frequent thought | Phase III (chronic) |
The mapping is not diagnostic. It is meant to indicate which kind of advice is more likely to apply. A phase-III pattern is a reasonable signal to look for clinically supervised CBT-i — either through a sleep medicine clinic or through a digital CBT-i program (Sleepio, Insomnia Coach, or equivalent) that have been validated in trials.
VI. What's next
The next essay (White noise, pink noise, nature sounds — your brain treats them as different things) takes a sharper, more specific gap: between the "background noise" most people use as a sleep aid and the neurological reality of how different sound types affect the autonomic nervous system. fMRI work over the past decade has shown that "white noise" and "natural soundscape" are not the same kind of input — they activate opposite branches of the autonomic nervous system.
A working summary, before that: figure out which phase you're in, then read advice from people writing for that phase. The phase-mismatch is responsible for much of the noise in popular sleep advice. Once it's clear, the relevant signal narrows considerably.