Why sleep hygiene is not a cure for insomnia: how to reap its benefits, but leave the rest.

We all know sleep hygiene

Very few people I see with insomnia have a problem of poor sleep hygiene. In fact, most people with chronic insomnia (consistent trouble falling and staying asleep) have excellent sleep hygiene and they're sick of well-meaning advice about cutting out coffee or sticking to regular bedtimes. In fact, they are already doing everything they can to set the stage for sleep, often with a level of diligence that creates more pressure than ease. 

Fun fact: sleep hygiene is often used as the “control condition” when researchers test treatments like Cognitive Behavioural Therapy for Insomnia (CBT-I). In other words, it’s the comparison we use to see whether something more active actually works. It’s not nothing, but it’s a bit like a sugar pill. 

Before looking at individual sleep hygiene tips, it is helpful to understand why these strategies rarely cure chronic insomnia. Then we can look at the common sleep hygiene tips around and work out what is worth keeping and what you can let go of. 

Why sleep hygiene does not cure insomnia

To treat insomnia effectively, we need to understand what is driving it. Sleep hygiene deals with surface behaviours, but chronic insomnia is maintained by deeper psychological and physiological drivers. These drivers vary from person to person, but some common themes show up, such as the following three:

Insomnia driver: sleep anxiety. Sleep anxiety involves worrying about whether you will sleep and how you will cope if you don't. It includes mental chatter, scanning for signs of tiredness, clock-watching, and trying to predict what tomorrow will feel like if sleep does not arrive.

This anxiety shows up in the body, and becomes a self-fulfilling prophecy. Even mild tension is enough to interfere with the down-regulation required for sleep, and for some people this escalates into a physical spike of alertness. 

Insomnia driver: spending too much time awake in bed. This is one of the strongest factors that fuels insomnia. The brain forms associations in a very literal way. If you spend many nights lying in bed awake, thinking, worrying, scrolling, trying to make sleep happen, your brain begins to pair the bed with wakefulness and effort rather than sleepiness. 

Over time, simply getting into bed can trigger a subtle rise in alertness. This is why many people with insomnia describe feeling drowsy on the couch but instantly wired the moment they lie down – this partly reflects the associations the brain has formed while we've been lying there awake. 

Rebuilding the association between bed and sleep is one of the most effective ways to treat insomnia, which is why many behavioural approaches involve reducing the time we spend in bed.  

Insomnia driver: Letting the day be driven by the night. This is an understandable pattern that gradually strengthens insomnia. After a poor night, people often cancel plans, rest more during the day, delay their morning or go to bed early in an attempt to recover. These choices make perfect sense but they weaken some of the biological drivers of sleep. They also add to the broader impact and suffering associated with insomnia. Small acts of reclaiming a daytime rhythm can gently nudge you toward a healthier relationship with sleep.  What sleep hygiene can help?

Below are the most common sleep hygiene recommendations. For most, the answer is the same. All these ideas are helpful in moderation, unhelpful when pursued too rigidly. 

Modern sleep advice can start to feel like a full-time job. Tea, sprays, supplements, routines, rules, trackers, temperature, screens. Some of these things may support healthy sleep, but they are not a cure for insomnia.

Keeping a consistent sleep schedule 

This advice is well-meaning because it supports our circadian rhythm. The circadian rhythm is the body’s internal clock. It governs the daily rise and fall in alertness, temperature, hormones and energy.

Light is its main time cue, which is why morning light plays such a large role in setting it. The key point is that the wake time matters far more than a fixed bedtime. Waking up at the same time each day helps your internal clock stay steady and pre-empt when its time to switch on into alertness. 

A consistent wake time also helps sleep pressure, which is the natural build-up of sleepiness that accumulates the longer we have been awake. When you get up at roughly the same time each day, this build-up becomes steadier and more predictable. 

Two patterns we can see in people with insomnia are:  

• letting the alarm slide after a rough night 

• going to bed at a fixed time even when the body is not sleepy 

A better approach is to get up at the same time each day and go to bed when sleepiness arrives. The exception is if sleepiness comes very early in the evening, in which case an early bedtime may lead to waking up way too early.  

Increasing morning light exposure

This is one of the strongest sleep hygiene recommendations because it taps directly into the circadian system. Morning light tells the brain that it is daytime and helps set the rhythm for the next night. 

Natural outdoor light is significantly stronger than indoor light, even on cloudy days. A short step outside is usually enough to give your body the signal it needs. 

Limiting screen use before bed 

This advice shows up everywhere and is partly correct. Screens influence the run-up to sleep in two ways. 

1. Light exposure can slightly delay melatonin release, which can shift the timing of sleepiness. 

2. The cognitive stimulation from phones is often more disruptive than the light itself. Emails, social media and fast-paced scrolling can create a mental hum that pushes sleep further away. 

For people with chronic insomnia, screens are rarely the primary issue. Things like sleep anxiety and a poor association between the bed and sleep tend to play much larger roles. If you have removed every enjoyable part of your evening in an attempt to protect sleep, it might be time to soften this rule. A restful evening routine matters, but it does not need to be screen-free to be sleep-friendly. 

A cool, dark and quiet bedroom 

This is the advice that tends to spark perfectionism. Eye masks, blackout curtains, cooling mattresses and white noise machines all have their place, but they can easily create the belief that sleep is only possible under ideal conditions. 

Human beings slept for hundreds of thousands of years in environments that were not cool, dark or quiet. We slept under moonlight, among others, with ambient noise and changing temperatures. A less than perfect environment can absolutely be annoying, especially for the lighter sleepers among us, but it rarely causes chronic insomnia. 

Avoiding large meals before bedtime 

This advice matters mainly for comfort. Heavy meals or spicy food can cause reflux or digestive discomfort. Beyond that, a late meal does not sabotage sleep. 

When food and mealtimes become another area to monitor and restrict, we are giving our insomnia too much power over our lives. More broadly, if your life is becoming smaller in service of sleep, it is a sign the advice has tipped into rigidity. 

Limiting or avoiding naps 

Here is where sleep hygiene aligns very well with how sleep actually works. Our brain has a 'homeostatic' (I.e., self-correcting) system that builds pressure for sleep throughout the day. A nap relieves some of that pressure, and while this is fine for many people it can be unhelpful when night-time sleep is already fragile.  

If you often nap because you feel exhausted from the night before, it is worth experimenting with reducing or removing naps for a week or two to see if your nights become less restless, and sleep is more consolidated. Some people find this makes a meaningful difference. 

Naps are not inherently bad. They simply need to be understood within the context of your overall pattern. 

Closing thoughts

Sleep hygiene can absolutely support healthy sleep, especially for people who don't have insomnia. Irregular routines, daytime naps or an uncomfortable sleep environment can cause disturbed sleep.

Once insomnia has taken hold, sleep hygiene is rarely the main issue. Most people with insomnia are already doing too much on the sleep hygiene front, not too little.

If you read this list and notice that you are doing every tip perfectly, or feel uneasy when you cannot, it may be a sign that sleep hygiene has become part of the anxiety rather than the solution. Your task is to start finding more space for enjoyment (especially at night) and stop moving through your waking hours with sleep in the front of your mind.

The work of improving sleep lies in teaching the nervous system that sleep does not need to be controlled. It involves rebuilding trust in your body's natural rhythms and reducing the time spent awake in bed so the association between bed and sleep can re-form.