Last updated: October 2026. Sources: GOV.UK (Office for Health Improvement and Disparities), NHS England, NHS.uk, NHS inform, GOV.WALES, the HSC Business Services Organisation (Northern Ireland), the Scottish Dental Clinical Effectiveness Programme, the Royal College of Anaesthetists, the Royal College of Surgeons of England and NHS hospital trust patient information. All figures, rules and eligibility details verified on 19 October 2026.
TL;DR Some children need teeth taken out under general anaesthetic, usually because of decay or infection that cannot be treated while they are awake. In the UK this only happens in hospital, and most children go home the same day. Follow your hospital's fasting letter exactly. NHS dental treatment is free for children in every UK nation.
Being told your child needs teeth out under a general anaesthetic can be worrying. You may be wondering why it cannot be done at the dentist, how long you will wait, what happens on the day and how to look after your child afterwards. This guide walks you through the whole journey, from referral to recovery at home.
It draws on guidance from NHS England, the Royal College of Anaesthetists, the Office for Health Improvement and Disparities (OHID) and patient leaflets from NHS (National Health Service) hospitals across the UK. Every hospital runs its service a little differently, so the instructions in your own appointment letter always come first. Use this guide to understand what to expect and which questions to ask.
Why some children need teeth out under general anaesthetic
Tooth decay is the main reason. OHID figures for the year to March 2025 show "33,976 episodes of tooth extractions with a primary diagnosis of tooth decay for 0 to 19 year olds" in NHS hospitals in England, an 11% rise on the year before [1]. The Royal College of Surgeons of England puts it another way: a young person needed a tooth out because of decay "likely under general anaesthetic, every 15 minutes" [31].
Decay hits younger children hardest. It accounted for 86.5% of hospital tooth extractions in 5 to 9 year olds, and OHID notes that "Tooth decay continues to remain the most common reason for hospital admissions in children aged between 5 and 9 years" [1]. Children in the most deprived areas had a decay-related extraction rate "just over 3 times" that of children in the most affluent areas [1]. OHID is careful to say that "No assumptions can be made about the method of anaesthesia provided for these procedures, but it is likely that the majority of episodes involved general anaesthetic." [1]
When a general anaesthetic is recommended
Most children can have teeth treated or removed while awake, with a numbing injection and sometimes sedation. A general anaesthetic is used when that is not realistic. King's College Hospital NHS Foundation Trust explains that a child "might need general anaesthetic because of the type of dental treatment they are having, or if they are not able to cope with the treatment when they are awake." [6]
The UK national clinical guideline on general anaesthesia in children's dentistry lists the situations where it is usually appropriate, including "Severe pulpitis requiring immediate relief", "Acute soft tissue swelling requiring removal of the infected tooth/teeth" and "Symptomatic teeth in more than one quadrant", and notes that "Severe pulpitis and acute infection are by far the most common conditions treated under GA" [5]. Pulpitis is inflammation of the nerve inside a tooth, which causes toothache, and a swelling usually means a dental abscess. Our guides to toothache relief and dental abscess symptoms and treatment explain these problems in more detail.
NHS England's clinical standard for children's dental care, published in June 2026, is clear that "general anaesthetic is a last resort and should only be used when all reasonable non-general anaesthetic alternatives have been explored" [2]. So if your child has been referred, their dentist will usually have tried, or ruled out, the alternatives first.
Why it only happens in hospital
You might remember being "put to sleep" at a dentist's surgery as a child. That no longer happens anywhere in the UK. A paper in the British Dental Journal records that "31 December 2001 was the final day on which a general anaesthetic could be given in a dental practice in UK. Henceforth all dental treatment requiring a general anaesthetic will have to take place in a hospital setting, which has immediate access to critical care facilities." [3] Scotland moved a little earlier: the Scottish Executive set the date "with effect from 1 April 2001" [4].
The change followed a Department of Health review called A Conscious Decision [5], and it still stands. NHS England's 2026 clinical standard says "Dental treatment under general anaesthetic must be provided in a hospital setting, as part of a specialist-led service." [2] King's College Hospital puts it simply for parents: "General anaesthetic cannot be given at your local dentist practice." [6]
This is the same whether your child sees an NHS or a private dentist. Neither can give a general anaesthetic in the practice, so a dentist who thinks your child needs one will refer them to a hospital or specialist service.
Alternatives your dentist may consider first
Before a referral, the dentist will think about whether your child could manage treatment in the chair. Guidance for dentists from the Scottish Dental Clinical Effectiveness Programme (SDCEP) says that "it is generally recommended that GA is only used after less invasive management options, such as inhalation sedation, have at least been properly considered, if not tried." [17]
The main options are:
- Local anaesthetic. A numbing injection near the tooth, with the child awake. The national guideline notes that "the majority of operative care can be carried out using either LA or LA with conscious sedation" [5], where LA means local anaesthetic.
- Inhalation sedation, sometimes called "happy air". King's College Hospital describes this as "a gas called nitrous oxide which is delivered with oxygen by a small mask placed on your child's nose", which "reduces anxiety, making the child a bit drowsy and less aware of the procedure" [25]. A local anaesthetic is still used to numb the tooth, and children can usually go home "as soon as they are alert and responsive, which should only take a few minutes" [25]. It works best if your child can breathe through their nose [25].
- Behaviour support. SDCEP advises dentists to try treatment "using behavioural management techniques and local anaesthesia if indicated" before referring [17], which often means short, gentle visits that build a nervous child's confidence.
If your child is anxious about the dentist, our guide to overcoming dental anxiety has practical ideas, and our dental sedation guide explains the different types of sedation.
Referral and waiting for treatment
If a general anaesthetic looks likely, your child's dentist refers them to a hospital or community dental service. SDCEP advises dentists to tell families that "their first visit to the centre will probably be for assessment only", and not to promise a general anaesthetic, because "this decision must be made by the clinician at the referral centre" [17]. Under NHS England's standard, every child referred should be "triaged for complexity, urgency and appropriate level" [2].
How long the wait is
There is no single published national waiting time for children's dental treatment under general anaesthetic in England. NHS England's clinical standard sets the expectation for hospital services as "92% within 18 weeks; 0% over 52 weeks" [2], in line with the NHS referral to treatment standard. Waits in practice depend on where you live, so ask your child's dentist or the hospital what the local wait is when the referral is made.
Pain while you wait
A referral is not a way to deal with sudden pain. SDCEP's guidance states that "Referral for sedation or GA is not a management option for acute dental pain." [17] Dentists are advised to "Continue to provide routine and preventive care for a child waiting for specialist care" [17]. NHS Lothian tells parents: "If your child experiences pain or discomfort from the mouth, before you receive the date to come to the hospital, please contact your own dentist." [11] Out of hours, call NHS 111. Our guide to urgent dental care explains your options.
The pre-assessment and consent
Before the day itself, the hospital checks that your child is well enough for an anaesthetic. Wirral Community Health and Care NHS Foundation Trust explains that "A nurse from the hospital will ring you to find out some details of your child's health and medication." [9] NHS England's standard says every child should have "a comprehensive treatment plan that maximises the benefit of the single general anaesthetic episode, reducing repeat general anaesthetic risk" [2], so the team may plan to fill or remove several teeth in one go.
Tell the hospital if your child becomes ill beforehand. King's College Hospital asks parents to get in touch "if your child develops a cough or cold within two weeks of the operation, or diarrhoea or vomiting within a few days of the operation" [6].
Who gives consent
For under-16s, a parent usually signs the consent form. NHS.uk explains that a child under 16 can consent to their own treatment if they have "enough intelligence, competence and understanding to fully appreciate what's involved", known as being Gillick competent, and that "Otherwise, someone with parental responsibility can consent for them." [18] Only one person with parental responsibility needs to consent [18]. Southampton Children's Hospital says "one parent or legal guardian must come with your child to the hospital, because they will need to sign consent forms on behalf of your child." [10] Staff will explain "the risks, benefits and alternatives" before you sign [6].
Fasting before the anaesthetic
Fasting is a safety rule for the anaesthetic, and it is the part of the process most likely to cause a cancelled appointment. The Royal College of Anaesthetists warns that "If your child has eaten food too recently, the operation will be delayed or postponed until another day." [15]
Fasting times vary between hospitals, so always follow the times in your own hospital letter, not a general guide. The Royal College of Anaesthetists says "The hospital should give you clear instructions about when your child should stop eating and drinking." [15] As an example, Wirral Community Health and Care NHS Foundation Trust currently uses these times [9]:
| What your child has | When to stop (Wirral example) |
|---|---|
| Food, milk, baby formula, sweets and chewing gum | 6 hours before you arrive at the hospital |
| Breast milk | 4 hours before you arrive at the hospital |
| Sips of clear fluids, such as water or very diluted squash | 1 hour before you arrive at the hospital |
Other hospitals give clock times instead, and some older leaflets still say water must stop 2 hours before. Allowing clear fluids up to 1 hour before has been recommended since a 2018 joint statement from UK and European paediatric anaesthesia societies [29]. Some hospitals now allow "sip til send", where children can keep having small amounts of clear drinks until they go to theatre [15].
Do not fast your child for longer than you have been told. Southampton Children's Hospital says plainly that "Excessive fasting is bad for your child." [10], and Wirral asks parents: "Please don't fast your child any longer than the times given above" [9].
What happens on the day
Each hospital differs, but the day usually follows this pattern:
- Arrival. Your letter gives an admission time, not an operation time [6]. Lists are busy, so be ready to stay for several hours [9]. The Royal London Dental Hospital tells families to expect to be there "for about 6 hours" [30].
- Checks and numbing cream. A nurse checks your child and may put numbing cream on the back of their hand. Oxford University Hospitals says this cream "works well for 9 out of 10 children" [14].
- Going to sleep. Usually "only one parent or carer will be able to stay with your child until they are asleep" [6]. The anaesthetic is given either through a thin tube called a cannula in the hand or as a gas through a mask; Wirral notes the gas "smells like felt tip pens" [9].
- The treatment. An anaesthetist, a doctor with specialist training, "stays with your child during the operation and carefully monitors them" [6]. Treatment usually takes about 45 minutes to an hour, depending on how many teeth are treated [30]. Your child will also have a numbing injection near the teeth, so their mouth will feel numb when they wake [30].
- Waking up. A nurse will fetch you as your child starts to wake [6]. Some children wake up upset or confused. The Royal College of Anaesthetists says younger children "may cry and roll about or wave their arms and legs. This behaviour may last around 30 minutes and occasionally longer." [15]
- Going home. Most children go home the same day. North Tees and Hartlepool NHS Foundation Trust keeps children on the unit "for a minimum of 1 hour" [13], while NHS Lothian says around two hours [11] and Oxford a minimum of 2 hours [14]. Travel home by car or taxi, not by bus or train, "as your child may feel sick and drowsy" [9]. Occasionally a child needs to stay overnight [12].
A few practical points help. Siblings are usually not allowed to come [11] [30]. Removed teeth are not normally given back [9], although some hospitals give a certificate for the tooth fairy instead [11]. King's College Hospital asks parents to "Have pain relief at home, as the hospital does not provide it." [6]
Aftercare at home
Most children "recover quickly and are soon back to normal" [15]. Your hospital will give you its own aftercare sheet, but the advice below is common to most NHS leaflets.
Bleeding
A little oozing from the gaps is normal [12]. If bleeding starts, King's College Hospital advises applying "pressure to the socket by encouraging your child to bite with a clean cotton gauze or handkerchief for at least 10 minutes" [7]. Evelina London says to use "a tightly rolled-up, damp cotton gauze" and to bite hard "for at least 10 minutes without disturbing the gauze or clot" [8]. If that does not stop it, call the hospital [7] [8]. Try to stop your child sucking the sockets or putting fingers in their mouth [12].
Pain relief
Hospitals usually recommend children's paracetamol or ibuprofen [7] [8]. King's College Hospital advises giving them "for pain and discomfort", reading the packet carefully and ensuring "the stated dose is not exceeded" [7]. Evelina London recommends "sugar-free paracetamol, or ibuprofen for children" [8]. Oxford University Hospitals, in its leaflet for children having oral surgery, says children can take them "for up to 5 days", and to phone the ward if your child is still in pain after that [14].
Doses depend on your child's age and the product, so check the NHS pages on paracetamol for children [27] and ibuprofen for children [28], and follow any instructions from the hospital. NHS.uk notes that "ibuprofen is not suitable for all children", for example a child who "has asthma" or "has a kidney or liver condition" may not be able to take it, so speak to a pharmacist if you are unsure [28].
Eating and drinking
Your child can eat and drink once they feel ready. Soft, cool foods are easiest for the first day or two, such as yoghurt, smoothies, mashed banana, scrambled egg and cool soup [8]. Avoid hot food and drinks, which may cause bleeding [8] [14]. While the mouth is numb, which can last "2 to 3 hours after the operation" [14], watch that your child does not "bite or chew their lips or cheeks" [7].
Brushing and rinsing
Keep brushing, but avoid the gaps. King's College Hospital says teeth "should be brushed as usual after the procedure", taking care around the extraction sites [7]. Evelina London says "Do not allow your child to rinse their mouth for 24 hours after the extractions." [8] After that, warm salt-water mouthwashes help healing; Evelina suggests using them "3 or 4 times each day for up to 5 days" [8].
Rest and school
Plan for your child to rest for the rest of the day. King's College Hospital notes that the anaesthetic "can take up to 24 hours to wear off" and that children should "avoid any vigorous activities for 24 hours" [7]. Advice on school varies. King's says your child "will need to be off school on the day of the procedure and the following day" [6], while Oxford's oral surgery leaflet suggests 2 to 3 days of extra rest [14]. Ask your hospital what it recommends.
When to get help
Contact the hospital if your child has severe pain, swelling or bleeding that will not stop [7]. Out of hours, call NHS 111 or go to A&E [7]. Evelina London says "If you are concerned that your child is seriously unwell at any time, go to the nearest emergency department (A&E) or phone 999." [8] King's College Hospital also notes a rare side effect: if your child cannot pee after the anaesthetic, take them to A&E [7].
Is a general anaesthetic safe for children
For healthy children, serious problems are rare. The Royal College of Anaesthetists says "Serious problems are uncommon with modern anaesthetics. Most children recover quickly and are soon back to normal after their operation and anaesthetic. Many children may feel sick or have a sore throat. This usually lasts a short time." [15] King's College Hospital, citing the Royal College of Anaesthetists, says "The risk of life-threatening complications for healthy children having minor or moderate non-emergency surgery is less than 1 in 100,000" [6].
Common, short-lived side effects listed by NHS.uk include feeling drowsy, feeling sick or being sick, shivering and a sore throat, which "will usually get better within a few minutes or hours" [16]. Confusion or distress on waking "is more likely in younger children of pre-school age" [15].
Dental specialists still treat a general anaesthetic as a serious step. The national guideline notes "a small but real risk of death associated with GA" [5], which is why NHS England calls it a last resort and expects the team to do as much as possible in a single anaesthetic [2]. If you have questions about your child's own health, such as asthma or a heart condition, ask at the pre-assessment.
What it costs: free NHS care for children
NHS dental treatment is free for children in every part of the UK, including treatment in hospital. The age rules are worded slightly differently in each nation:
| Nation | Who gets free NHS dental treatment | Source |
|---|---|---|
| England | Under 18s, or under 19s in full-time education | [19] |
| Scotland | Everyone under 26 | [20] |
| Wales | Under 18s, or 18 year olds in full-time education | [21] |
| Northern Ireland | Those aged 18 or under, or 18 and in full-time education | [22] |
In England, NHS.uk also lists treatment "in an NHS hospital from a hospital dentist" as free [19], and Wales lists NHS hospital dental out-patients and in-patients treated by the hospital dentist [21]. If your family receives certain benefits or has a low income, you may also be able to claim back the cost of travel to hospital through the Healthcare Travel Costs Scheme [26]. For a fuller picture of who pays what, see our guides to free NHS dental treatment and NHS dental charges. If an adult in your family is facing an extraction, our tooth extraction cost guide compares NHS and private prices.
Preventing the need for another general anaesthetic
A general anaesthetic fixes today's problem, but it does not stop new decay. NHS England's standard says "every dental general anaesthetic episode must include a structured preventive intervention (for example fluoride varnish, fissure sealants where indicated, and a written prevention plan)" [2], and that a follow-up "should be arranged within 3-6 months" [2]. King's College Hospital notes that afterwards "your child's dental care will be transferred to their local dentist" [6].
The government's Delivering Better Oral Health toolkit lists children who have needed treatment under general anaesthetic among those who need extra preventive support [24]. The everyday steps make a real difference:
- Fluoride toothpaste. NHS.uk advises children's toothpaste with at least 1,000ppm fluoride for under-3s (a smear), 1,000ppm to 1,500ppm for 3 to 6 year olds (a pea-sized amount), and 1,350ppm to 1,500ppm from age 7 [23].
- Spit, do not rinse. After brushing, spit out the toothpaste rather than rinsing, because "if you rinse, the fluoride won't work as well" [23].
- Fluoride varnish. "From the age of 3, children should be offered fluoride varnish application at least twice a year." [23] Children at higher risk may need it more often [24].
- Sugar. Delivering Better Oral Health advises keeping sugary food and drinks to a minimum, avoiding them at bedtime and choosing "sugar-free versions of medicines if possible" [24].
- Regular check-ups. See our guide to how often children should see the dentist, and our electric vs manual toothbrush guide if you are choosing a new brush.
If you have a younger child too, our guide to a child's first dental visit explains how to get them started early.
Frequently asked questions
Is general anaesthetic safe for children's teeth?
For healthy children, serious problems are rare. The Royal College of Anaesthetists says serious problems are uncommon with modern anaesthetics and most children recover quickly [15]. Sickness, a sore throat and feeling upset on waking are common but usually short-lived [15] [16]. Because there is still a small risk, NHS England treats it as a last resort [2].
Why can't my child have teeth out under general anaesthetic at the dentist?
Since 2001, a general anaesthetic for dental treatment can only be given in a hospital with immediate access to critical care facilities [3]. NHS England's 2026 standard says it must be provided in a hospital setting as part of a specialist-led service [2]. This applies whether your child sees an NHS or private dentist.
How long does a child's dental general anaesthetic take?
The treatment itself usually takes about 45 minutes to an hour, depending on how many teeth are treated [30]. Your child then spends at least an hour or two recovering before going home [13] [14]. Allow for most of the day: the Royal London Dental Hospital tells families to expect about 6 hours at hospital [30].
Can my child eat or drink before a dental general anaesthetic?
Follow the times in your hospital letter. Rules vary, but a common pattern is no food or formula milk for 6 hours, no breast milk for 4 hours and sips of clear fluids until 1 hour before arrival [9]. If your child eats too recently, the operation may be postponed [15]. Do not fast them for longer than advised [10].
How long will my child need off school after a dental general anaesthetic?
It depends on the hospital and the treatment. King's College Hospital advises keeping children off school on the day and the following day [6], and avoiding vigorous activity for 24 hours [7]. Oxford's oral surgery leaflet suggests 2 to 3 days of rest [14]. Follow the advice your hospital gives you on the day.
Is dental treatment under general anaesthetic free for children?
Yes. NHS dental treatment is free for children in every UK nation, and NHS.uk also lists treatment in an NHS hospital from a hospital dentist as free [19]. The age limits differ slightly, for example under 18 in England and under 26 in Scotland [19] [20]. Some families can also claim travel costs [26].
Can I go in with my child while they go to sleep?
Usually one parent or carer can stay with your child in the anaesthetic room until they are asleep, but you cannot stay during the treatment [6] [30]. A nurse will bring you to your child as soon as they start to wake up [6]. Siblings are usually not allowed to come on the day [11].
How long is the wait for children's dental general anaesthetic?
There is no single published national figure. NHS England's 2026 standard sets the expectation that 92% of children start hospital treatment within 18 weeks and none wait over 52 weeks [2]. Local waits vary, so ask the dentist or hospital. If your child is in pain while waiting, contact your own dentist [11] [17].
Finding a dentist for your child
Children usually reach hospital dental care through a referral, often from their regular dentist [2], and their care goes back to the local dentist afterwards [6]. Regular check-ups also give the best chance of catching decay early, before a hospital visit is needed. NHS dental care for children is free, but we know finding an NHS practice with space for new patients can take persistence, and our guide to finding an NHS dentist accepting new patients has practical tips.
When you are ready, search for a dentist near you on Dentists Closeby to compare NHS and private practices in your area and find one that suits your family.
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