Almost everyone has a bad night now and then. A noisy street, a stressful day or a late coffee can leave you staring at the ceiling at 2am, and it usually passes. Insomnia is different. The NHS describes it simply: you regularly have problems sleeping. When that pattern settles in, it can affect your mood, your concentration and how you get through the day, and it is worth taking seriously rather than putting up with.
The good news is that insomnia is well understood and there are practical things that help. This guide explains what insomnia is, why it happens, what you can try yourself, when it is time to see a GP, and what cognitive behavioural therapy for insomnia involves. It is based on NHS guidance, and it is general information rather than medical advice.
In short
- Insomnia means regularly having problems sleeping. Short-term insomnia lasts less than three months; long-term insomnia lasts three months or more.
- Common causes include stress, anxiety, depression, noise, temperature, alcohol, caffeine, nicotine, jet lag and shift work.
- Self-help starts with consistent sleep and wake times, a calming wind-down, a dark and quiet bedroom, regular exercise and keeping devices away before bed.
- See a GP if changing your habits has not helped, if the problem has lasted for months, or if it is seriously affecting your daily life.
- The NHS says GPs may offer cognitive behavioural therapy (CBT), face to face or online. Sleeping pills are only prescribed for a few days or weeks at most.
What counts as insomnia?
The NHS lists the signs plainly. You might find it hard to fall asleep, wake up repeatedly during the night, wake up early and be unable to get back to sleep, or feel tired during the day. Many people also find it hard to concentrate during the day because they are tired.
What separates insomnia from an unlucky night is how long and how often it happens. The NHS distinguishes between:
- Short-term insomnia, which lasts for less than three months.
- Long-term insomnia, which lasts for three months or longer.
That distinction matters for what happens next. A rough patch around an exam, a house move or a difficult week at work often settles once the stress passes. Trouble that carries on for months is more likely to need proper help, and it is more likely to have become a habit that keeps itself going.
Why does insomnia happen?
There is rarely a single cause. The NHS points to a mix of everyday triggers and underlying conditions.
Everyday and lifestyle causes include:
- Stress, anxiety or depression.
- Noise, which is a familiar problem in a busy city, and a bedroom that is too hot or too cold.
- Alcohol, caffeine and nicotine.
- Jet lag.
- Shift work.
Medical conditions can also affect sleep. The NHS lists restless legs syndrome, thyroid problems and the menopause among them.
Seeing the whole list is useful because it shows that insomnia is not a personal failing. It is often the result of several things stacking up, and fixing even one of them can help. It also explains why the NHS recommends speaking to a GP if the problem does not shift: if an underlying health condition is involved, it needs its own attention.
What can you try yourself first?
The NHS suggests a set of self-help steps that are worth trying before anything else. None needs equipment or a prescription, though they do need consistency.
- Keep regular sleep and wake times. Going to bed and getting up at roughly the same time each day helps your body settle into a rhythm.
- Relax before bed. Give yourself time to wind down rather than going straight from a busy evening to the pillow.
- Make your bedroom dark and quiet. The NHS also highlights temperature as a factor, so a room that is too hot or too cold can work against you.
- Exercise regularly. Physical activity during the day is part of the NHS advice.
- Avoid screens right before bed. The NHS advises avoiding television or devices such as smartphones just before you go to bed.
- Watch alcohol, caffeine and nicotine. The NHS names all three as common contributors.
If you want more on how timing and habits affect your nights, our guides to why you might be waking up at 3am and what helps and naps and when they make sleep worse cover two of the most common sticking points.
Be patient with self-help. Habits that took months to build rarely reverse in a single night. What matters is whether things improve over several weeks, and whether you notice yourself sleeping better, not whether any one night is perfect.
When should you see a GP?
According to the NHS, you should see a GP if:
- changing your habits has not helped,
- you have had trouble sleeping for months, or
- the insomnia is significantly affecting your daily functioning.
You do not need to wait until you are exhausted or desperate. Booking an appointment sooner can help rule out an underlying cause. Because conditions such as restless legs syndrome, thyroid problems or menopause symptoms can disturb sleep, a GP can look at the wider picture rather than treating the sleeplessness in isolation.
To make the appointment as useful as possible, it helps to think through a few things beforehand:
- How long the problem has lasted, and whether it has been getting better or worse.
- What a typical night looks like: how long it takes to fall asleep, how often you wake and when.
- What you have already tried and what difference it made.
- Your daily habits around caffeine, alcohol and nicotine, and whether you work shifts or travel across time zones.
- How you are feeling in general, including any stress, low mood or anxiety.
Those are the same factors the NHS lists as common causes, so they are exactly what a clinician will want to understand.
What is CBT for insomnia?
The NHS says that a GP may offer cognitive behavioural therapy (CBT), either face to face or online. It describes the aim as addressing the thought patterns that are disrupting your sleep. Clinicians often shorten the sleep-specific version to CBT-I.
The NHS’s general description of CBT explains how it works. It is “a type of talking therapy where a therapist helps you to change how you think and act.” In sessions you discuss difficult situations and work out different ways of approaching them, and practice between sessions is an important part of making it work. For insomnia, that means looking at the thoughts and behaviours that keep sleep problems going, such as lying awake worrying about not sleeping, and finding ways to change them.
CBT can be delivered in several ways, according to the NHS:
- One-to-one sessions with a therapist.
- Group sessions.
- Guided self-help, where you work through a workbook or an online course.
It can be in person, online or by phone. The NHS says you will usually have between 5 and 15 sessions of CBT, depending on what you are having it for. That is a general figure for CBT as a whole, so your own programme may differ, and it is worth asking what to expect.
CBT also asks something of you. It is not a pill that works while you wait. The NHS stresses the importance of practising between sessions, so it suits people who are ready to experiment with changing routines and thinking patterns. The upside is that the skills belong to you afterwards.
How do you get CBT on the NHS?
The NHS says that for many mental health problems, such as anxiety and depression, you can refer yourself to NHS Talking Therapies without speaking to a GP, if you are 18 or over, or 16 or over in some areas. Whether a given service accepts self-referrals specifically for sleep problems can vary, so the simplest route is to ask your GP, or to contact your local NHS Talking Therapies service and ask what they offer. The NHS also confirms that CBT can help with sleep problems such as insomnia.
What about sleeping pills?
Many people ask about medication, so it is worth being clear. The NHS says that sleeping pills are only prescribed for a few days, or weeks at the most, when insomnia is severe or when other treatments have not worked. They are not presented as a long-term solution. If you are tempted to rely on something to get through a bad patch, a GP can talk through the options and the risks with you. Do not stop or change prescribed medicines without medical advice.
Looking after yourself while you wait
Waiting for an appointment or therapy can be frustrating, particularly if you are tired and stressed. A few steps that fit with NHS guidance can help in the meantime:
- Stay consistent with your wake-up time, even after a poor night.
- Keep going with regular exercise and daytime routines.
- Protect your wind-down time in the evening and limit screens.
- Cut back on caffeine, alcohol and nicotine if you notice they affect your nights.
- Notice what is bothering you. If worry or low mood is at the root, say so when you speak to a health professional.
For a wider look at why consistent sleep matters, our explainer on why sleep matters for everyday health sets out what is at stake when sleep goes wrong.
Frequently asked questions
How long does insomnia have to last before it is a problem?
The NHS defines insomnia as regularly having problems sleeping, and separates short-term insomnia (less than three months) from long-term insomnia (three months or more). You should see a GP if changing your habits has not helped or if the trouble has lasted for months.
Is CBT for insomnia only available privately?
No. The NHS says GPs may offer CBT, face to face or online, and CBT is also available through NHS Talking Therapies services. Ask your GP or local service what is available where you live.
Can insomnia be a sign of something else?
Sometimes. The NHS lists medical conditions such as restless legs syndrome, thyroid problems and the menopause among the causes of poor sleep, as well as stress, anxiety and depression. That is why a GP appointment can be valuable if the problem persists.
Should I take sleeping pills?
The NHS says sleeping pills are only prescribed for a few days or weeks at the most, when insomnia is severe or other treatments have failed. Talk to a GP rather than relying on medication without advice.
The bottom line
Occasional bad nights are part of life, but regular trouble sleeping deserves attention. Start with the basics, from steady sleep and wake times to a calm, dark bedroom. If those do not work, or the problem has lasted for months, see your GP, who can look for underlying causes and discuss options such as CBT. Help is available, and it does not have to involve medication.
This article is general information and is not a substitute for advice from a doctor or other qualified health professional. If you are worried about your sleep or your health, speak to your GP. If you feel unable to cope, seek help promptly through your GP or NHS services.
Sources: NHS — Insomnia; NHS — Cognitive behavioural therapy (CBT).
