When to See a GP About Sleep: Red Flags, 111 and 999

See a GP about sleep when changing your sleeping habits has not helped, when you have had trouble sleeping for months, or when insomnia is affecting your daily life in a way that makes it hard to cope: the three thresholds on the NHS insomnia page. Some signs earn an appointment on their own: breathing that stops and starts in sleep, falling asleep suddenly in the day, legs you cannot keep still at night, or low mood most of the day for more than two weeks. A few are 999 calls: the signs of a heart attack or stroke, or feeling you may be about to harm yourself. This page gathers the NHS and NICE wording so the whole Wellgard sleep guide can point to it.^1,2,3,10

How long is too long to go without proper sleep?

The NHS does not count bad nights. Insomnia "means you regularly have problems sleeping"; it is short-term under 3 months and long-term at 3 months or longer.¹ NICE's Clinical Knowledge Summary (CKS) adds the test that matters: insomnia "results in impaired daytime functioning", and sleep disturbance without that impairment "is not considered to be insomnia disorder". Chronic insomnia "occurs at least several days per week and lasts for 3 months or longer".² Adults need 7 to 9 hours, and "you probably do not get enough sleep if you're constantly tired during the day".¹ So "too long" is months of trouble or days you cannot function. Waking at 3am usually has an ordinary cause (the 3am page), and feeling tired but wired is a pattern, not a diagnosis; either crosses the NHS line once it runs for months or stops you coping.

Which sleep problems need a GP appointment?

Each row quotes the NHS page.

When is a sleep problem a 111 or 999 matter?

NHS 111 "can help if you think you need medical help right now", including "when your GP is closed"; if you are not sure whether to call 999, get help from 111 first. 999 "is for life-threatening emergencies like serious road traffic accidents, strokes and heart attacks".¹¹ Waking with these signs is a 999 call: chest pain that feels tight or like squeezing, or spreads to your arms, neck or jaw; severe difficulty breathing, "gasping, choking or not able to get words out"; pale, blue or grey lips or skin; or the FAST signs of a stroke, even if they have stopped. Do not drive yourself to A&E.¹² The NHS is direct on the danger point: if "you feel that you may be about to harm yourself, call 999 for an ambulance or go straight to A&E". Short of that, ask a GP for an emergency appointment, call NHS 111, or ring Samaritans on 116 123.¹⁰

What will the GP ask, and what can they offer?

CKS sets out the assessment: symptoms and duration; the effect on "quality of life, ability to drive, employment, relationships, and mood"; triggers (stress, shift work, jet lag); what happens while you sleep (snoring, witnessed pauses in breathing, restless legs, sleepwalking); prescribed medicines; caffeine, alcohol and nicotine; and depression and anxiety screening with the PHQ-9 and GAD-7. A two-week sleep diary may be asked for.²

In the NHS's words, the GP "will try to find out what's causing your insomnia"; you may be offered cognitive behavioural therapy (CBT), "face-to-face with a therapist, or through an online self-help programme", or a sleep clinic referral; "GPs now rarely prescribe sleeping pills", and then only "for a few days, or weeks at the most".¹ CKS makes CBT for insomnia (CBT-I) first line for short-term and chronic insomnia "in adults of all ages", because its benefits persist after the course ends, and names a NICE-recommended digital programme. Any hypnotic is a course of no more than two weeks, not for older people or in pregnancy or breastfeeding; daridorexant only when CBT-I has been tried but not worked, or is unavailable or unsuitable; prolonged-release melatonin may be considered over 55 for up to 13 weeks (why melatonin is prescription-only in the UK).² In 20 trials of 1,162 adults, CBT-I brought sleep onset forward by 19 minutes and cut time awake in the night by 26 minutes, with gains holding at follow-up.¹⁶ Yet in 765,035 London primary-care records only 1.7% of people with coded insomnia had been referred, so ask for it by name.¹⁷

Is it sleep apnoea? Snoring, pauses and daytime sleepiness

The NHS night signs are breathing that stops and starts, "gasping, snorting or choking noises", waking a lot and loud snoring; by day, feeling very tired, poor concentration, mood swings and a morning headache. "It can be hard to tell if you have sleep apnoea", so ask someone to watch you sleep. At the sleep clinic you wear devices overnight, usually at home; the result is an AHI score of 5 to 14 (mild), 15 to 30 (moderate) or over 30 (severe), and a CPAP machine is free on the NHS if you need one. Do not take sleeping pills unless a doctor recommends them: "they can make sleep apnoea worse".³ Among the cases CKS lists for urgent referral are sleepiness affecting a professional driver or safety-critical worker, pregnancy, and pre-operative assessment for major surgery.⁴ On the Epworth Sleepiness Scale a score above 10 counts as excessive in research, and 45.6% of 1,311 insomnia patients at one sleep laboratory scored that high.¹⁸

Restless legs: when do they need a GP?

Restless legs syndrome is "a strong urge to move your legs, usually when resting at night"; see a GP if it stops you sleeping, affects your mental health or does not ease with self-help. It is "thought to be linked to the levels of iron and the brain chemical dopamine" and can go with pregnancy, iron deficiency anaemia, kidney disease and some medicines; "you may need iron supplements if you have low levels of iron in your blood", so the blood test comes first.⁵ CKS recommends iron at a serum ferritin of 75 ng/mL or less, names some antidepressants, some antipsychotics and lithium among drugs that can cause it, and refers on to a specialist if treatment fails.⁶

Could a medicine be disturbing your sleep?

"Many medicines can also cause insomnia", says the NHS, and CKS names corticosteroids, SSRIs, SNRIs and beta-blockers as examples.^1,2 Sleeping pills are a listed sleepwalking trigger, and the NHS rule is: "do not stop taking medicines without talking to a GP".⁸ The GLP-1 medicines and sleep page covers what those trials recorded, and which menopause supplements have evidence covers what the trials found.

What does the NHS say to try first?

The NHS insomnia page's list. Do: go to bed only when sleepy; get up at the same time every day; relax for at least 1 hour before bed; keep the bedroom dark and quiet; exercise regularly during the day. Don't: smoke or drink alcohol, tea or coffee in the 6 hours before bed; eat a big meal late; exercise in the 4 hours before bed; use devices right before bed; nap; drive when sleepy; or sleep in after a bad night.¹ CKS adds that in chronic insomnia sleep hygiene "is not recommended as a standalone management"; it works better inside CBT-I.² On anything else, the NHS line is "check with your doctor before taking anything for your sleep problems"; which sleep supplements have evidence behind them sets out what the trials measured.¹

Frequently asked questions

What sleep disorders will a GP consider besides insomnia?

CKS lists obstructive sleep apnoea, circadian rhythm disorders (shift work and jet lag), restless legs syndrome, periodic limb movement disorder, narcolepsy and parasomnias, because they so often coexist with insomnia.²

Can I refer myself for therapy without a GP?

For anxiety and depression, yes: you can refer yourself to NHS Talking Therapies if you are registered with a GP and aged 18 or over (16 in some areas). For insomnia itself, the NHS route is the GP, who can offer CBT-I face-to-face or online.^1,14

Do I have to tell the DVLA about a sleep problem?

Yes, for confirmed moderate or severe obstructive sleep apnoea syndrome with excessive sleepiness, narcolepsy or cataplexy, or "any other sleep condition that has caused excessive sleepiness for at least 3 months", and "you must not drive until you're free from excessive sleepiness". The fine for not telling them is up to £1,000.¹⁵

What will a doctor prescribe if I can't sleep?

Usually nothing, by design: GPs now rarely prescribe sleeping pills and CKS makes CBT-I first line; hypnotics are not prescribed routinely, only as short courses, and not continued beyond two weeks.^1,2

Sources

1. NHS. Insomnia (reviewed 19 March 2024). nhs.uk/conditions/insomnia.
2. NICE CKS. Insomnia (June 2026): summary, assessment, managing insomnia, differential diagnosis.
3. NHS. Sleep apnoea (reviewed 11 May 2026). nhs.uk/conditions/sleep-apnoea.
4. NICE CKS. Obstructive sleep apnoea syndrome (November 2025). cks.nice.org.uk.
5. NHS. Restless legs syndrome (reviewed 22 September 2025). nhs.uk.
6. NICE CKS. Restless legs syndrome (July 2026). cks.nice.org.uk.
7. NHS. Narcolepsy (reviewed 9 September 2026). nhs.uk.
8. NHS. Sleepwalking; Sleep paralysis.
9. NHS. Depression in adults: symptoms. nhs.uk.
10. NHS. Help for suicidal thoughts. nhs.uk.
11. NHS. When to use NHS 111; When to call 999.
12. NHS. Heart attack; Symptoms of a stroke.
13. NHS. Tiredness and fatigue. nhs.uk.
14. NHS. Talking therapies. nhs.uk.
15. GOV.UK. Excessive sleepiness and driving. gov.uk.
16. Trauer JM, et al. Cognitive behavioral therapy for chronic insomnia: a systematic review and meta-analysis. Annals of Internal Medicine, 2015. PubMed 26054060.
17. Waterman LZ, et al. Patterns of insomnia and its treatment in North Central London. BJPsych Open, 2025. PubMed 41404781.
18. Hein M, et al. Prevalence and risk factors of excessive daytime sleepiness in insomnia sufferers: a study with 1311 individuals. Journal of Psychosomatic Research, 2017. PubMed 29167048.