Oesophageal dilatation
A procedure done during a gastroscopy to gently stretch a narrowed part of the gullet (oesophagus) so that food and drink can pass more easily.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- It stretches a narrowed gullet so swallowing is easier, but it treats the narrowing, not the cause.
- The narrowing often comes back, so repeat stretches are common, particularly for acid-related scarring.
- It is usually done during a gastroscopy under throat spray or sedation, and most people go home the same day.
- The main serious risk is a tear (perforation) of the gullet; severe chest pain, breathlessness or fever afterwards needs urgent help.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Can quickly ease food sticking and difficulty swallowing
The cause of the narrowing has not been assessed, so a tumour or eosinophilic oesophagitis could be missed without biopsies.
You may feel pressure or mild discomfort in the chest as the narrowing is stretched; the team watches you closely throughout.
Clear, written warning signs (severe chest pain, breathlessness, fever) and a number to call any time.
You may feel pressure or mild discomfort in the chest as the narrowing is stretched; the team watches you closely...
You rest in recovery while any sedation wears off. The team checks you can swallow safely before letting you drink...
If you had sedation you must not drive, work, sign legal documents or be alone; have an adult stay with you. Watch...
A mild sore throat and a little chest soreness usually settle. Swallowing often improves, though it can take a...
What is oesophageal dilatation?
Oesophageal dilatation is a way of treating a narrowing (a stricture) in the gullet, the tube that carries food from your mouth to your stomach. The narrowing can make it hard or uncomfortable to swallow. During a gastroscopy, the doctor passes a soft balloon or a tapered plastic tube (a bougie) across the narrowed part and gently stretches it open.
It is done to relieve symptoms such as food sticking, slow swallowing or the feeling of a blockage. It treats the narrowing itself; it does not cure the underlying cause, such as acid reflux, scarring, a swallowing muscle problem (achalasia) or, in some people, cancer.
The effect is often not permanent. Many narrowings, especially those caused by acid scarring, tend to tighten again over time, so the stretch may need to be repeated. Your doctor will also usually take small samples (biopsies) to check why the gullet has narrowed.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Options at a glance
These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.
Balloon dilatation
A deflated balloon is passed through the gastroscope, sat across the narrowing, then inflated to a set size to stretch it open in one steady push.
Bougie (Savary) dilatation
A series of smooth, tapered plastic dilators of increasing width are passed over a guidewire to widen the narrowing in gradual steps.
Dilatation for achalasia
For the tight lower-gullet muscle of achalasia, a larger pneumatic balloon may be used to stretch and partly tear the muscle; this is a specialist procedure with its own...
Dilatation with steroid injection
For strictures that keep coming back, a steroid may be injected into the narrowing at the same time to try to slow re-scarring.
Preparing for your procedure
- You will usually be asked not to eat for about 6 hours and not to drink for about 2–4 hours beforehand, so the gullet and stomach are empty.
- Tell the team about blood-thinning or antiplatelet medicines (such as warfarin, apixaban, clopidogrel), as these may need planning around the procedure.
- Mention diabetes and your diabetes medicines, as fasting affects how you take them.
- Tell the team if you could be pregnant, or have heart, lung or sleep-apnoea problems that affect sedation.
- Arrange for a responsible adult to take you home and stay with you if you choose sedation; you cannot drive or work for 24 hours.
- Bring a list of your medicines and mention any loose teeth, crowns or bridges.
- Ask whether biopsies are planned and when you will get the results.
What happens
The procedure is part of a gastroscopy. You will usually be offered either a numbing spray to the back of the throat (so you stay awake) or sedation through a small cannula to help you relax. You lie on your left side and a thin, flexible camera is passed through your mouth into the gullet.
When the doctor reaches the narrowed area, they pass a balloon or a tapered dilator across it and stretch it gently, sometimes in stages to a target width. The doctor watches throughout and may take small tissue samples. The stretching part usually adds only a few minutes.
Afterwards you rest in a recovery area while any sedation wears off and the team checks you are comfortable and swallowing safely. Many people can drink and then eat before going home the same day, once the team is happy.
Is this procedure right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- The cause of the narrowing has not been assessed, so a tumour or eosinophilic oesophagitis could be missed without biopsies.
- There is a suspected or known perforation, or a very high-risk, sharply angled or extremely tight narrowing where stretching is unsafe.
- You cannot safely stop blood-thinning medicines and the bleeding risk is judged too high.
- Sedation would be unsafe and the procedure cannot be done with throat spray alone.
- The real problem is a swallowing or motility disorder that needs different tests or treatment first.
Delay or rearrange if…
- You have an active chest or throat infection, or are acutely unwell.
- You have not fasted as instructed.
- Blood-thinning or antiplatelet medicines have not been planned around safely.
- You could be pregnant and the risks and timing have not been discussed.
- Biopsy or imaging results that would change the plan are still awaited.
Alternatives to discuss
- Treating the cause first, such as strong acid suppression for reflux-related narrowing.
- A stent for some malignant or persistent strictures, instead of repeated stretching.
- Surgery (for example a myotomy for achalasia, or anti-reflux surgery) where appropriate.
- Dietary changes and careful eating where symptoms are mild.
- No dilatation, with watchful monitoring, if symptoms are minor and the cause is benign.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Comfort, sedation or contrast choices
If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.
Benefits
- Can quickly ease food sticking and difficulty swallowing
- Lets many people return to a more normal diet and better nutrition
- Avoids or delays bigger surgery in many cases
- Allows biopsies to be taken to find the cause of the narrowing
- Can be repeated if the narrowing tightens again
Risks & complications
- A sore throat, mild chest discomfort or bloating for a short time
- Temporary swallowing soreness as the stretched area settles
- Small amounts of blood-streaked saliva
- The narrowing returning so the stretch is needed again
- Bleeding from the stretched area
- A reaction to the sedation, such as low oxygen or low blood pressure
- Damage to teeth, crowns or bridges
- Incomplete relief, so swallowing is only partly improved
- A tear (perforation) of the gullet wall, which can need a chest drain, antibiotics, a stent or an operation
- Aspiration (food or fluid going into the lungs), which can cause a chest infection
- Serious bleeding needing transfusion or further treatment
- Very rarely, a complication that is life-threatening
The most important serious risk is a perforation (tear) of the gullet. UK and audit data suggest this is uncommon overall and lower for benign (non-cancer) narrowings than for cancer-related ones, but it is more likely with very tight, long or irregular strictures and with less experienced operators. Ask how experienced the endoscopist is with dilatation, how tight your narrowing is, and exactly what to do if you get severe chest pain, breathlessness or a fever afterwards.
Published figures to discuss
Reliable figures come mainly from UK and audit data and vary with how tight, long and irregular the narrowing is, whether it is benign or due to cancer, the technique used and the operator's experience. The numbers below are cautious and should be read as ranges, not promises; your own risk depends on your anatomy and the reason for the narrowing.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Perforation (tear) — benign strictures | Around 1 in 100 (about 1.1%) in UK audit data, with mortality if it occurs of roughly 0.5% | Lower than for cancer-related strictures; higher with very tight, long or angled narrowings and less experienced operators. | Endoscopic management of refractory benign oesophageal strictures — PMCpmc.ncbi.nlm.nih.govPublished figure |
| Perforation — all strictures (benign and malignant combined) | Around 2–3% overall in older UK audit data, higher (around 6%) for malignant strictures | Risk is concentrated in complex and cancer-related narrowings; benign dilatation is generally safer. | Endoscopic management of refractory benign oesophageal strictures — PMCpmc.ncbi.nlm.nih.govPublished figure |
| Recurrent narrowing needing repeat dilatation | A substantial minority, with roughly a third of people developing recurrent swallowing problems within the first year in some series | Especially common with acid-related and post-surgical strictures; some people need a planned programme of stretches. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is usually no major physical recovery, but you do need a short period of monitoring and you must be watched for signs of a tear in the hours and first day or two afterwards.
- A mild sore throat or hoarseness for a day or so
- Mild central chest soreness that eases quickly
- Bloating or wind from air used during the test
- Feeling tired or a bit fuzzy after sedation
- Gradually easier swallowing over the next day or two
Aftercare
- Start with sips of fluid, then soft foods, as advised, before returning to a normal diet.
- If you have sedation, rest for the day and do not drive or operate machinery for 24 hours.
- Take any prescribed acid-suppressing medicine, as this can help reduce re-scarring of acid-related strictures.
- Eat slowly, chew well and stay upright after meals, especially if reflux is part of the problem.
- Keep any follow-up or repeat-dilatation appointments.
- Chase up biopsy results if you have not heard within the time you were given.
- Keep the unit's contact number and know who to call out of hours.
- Responsible adult to collect you and stay overnight if you have sedation
- No driving or work planned for 24 hours after sedation
- Soft foods and fluids ready at home for the first day
- Acid-suppressing medicine collected if prescribed
- Unit and out-of-hours contact numbers saved
- A note of when biopsy results are due
- A plan agreed for if swallowing tightens again
⚠ Get urgent help if…
- Severe or worsening chest, back or upper-tummy pain
- Pain when breathing, breathlessness or a fast heartbeat
- A high temperature, chills or feeling very unwell
- Vomiting blood, or material that looks like coffee grounds
- Black, tarry stools
- Pain or crackling under the skin of the neck or chest
- Being unable to swallow even your own saliva
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
Many people notice that food passes more easily soon after a dilatation, and a more normal diet often becomes possible. Your doctor may aim to stretch the narrowing to a target width, sometimes over more than one session, rather than all at once, to reduce the risk of a tear.
A dilatation relieves the narrowing but does not prove the cause is harmless or cure the underlying problem. Biopsy results are needed to confirm why the gullet narrowed, and ongoing treatment, such as acid suppression, is often needed alongside.
How long the benefit lasts varies a lot. Some narrowings stay open for a long time after one or two stretches, while acid-related and post-surgical strictures often tighten again, and a noticeable proportion of people need repeat dilatation within the first year. For strictures that keep coming back, your doctor may suggest stronger acid treatment, steroid injection at dilatation, or a planned programme of stretches.
Related tests, treatments or support
Dilatation is usually done during a gastroscopy, so the camera examination and biopsies happen at the same visit. It is often combined with acid-suppressing treatment for reflux-related strictures, and may be part of a wider plan that includes anti-reflux surgery, a stent or cancer treatment depending on the cause.
Follow-up & long-term care
You will normally be given a plan for biopsy results and a review of your symptoms. If swallowing improves and stays good, you may not need routine repeat tests; if it tightens again, a repeat dilatation can be arranged. For cancer-related or complex strictures, follow-up is usually within a specialist team.
- Ongoing acid-suppressing medicine for reflux-related strictures, as advised
- Planned repeat dilatations for narrowings that keep tightening
- Eating slowly, chewing well and avoiding tablets dry-swallowed
- Keeping in touch with the team if swallowing changes
Repeat, follow-on and what comes next
- Repeat dilatation is common, particularly for acid scarring and post-surgical narrowings.
- Some people move to a planned schedule of stretches, or to a stent or surgery if dilatation keeps failing.
- If biopsies later show an unexpected cause, the whole treatment plan may change.
- Incomplete relief can mean a further procedure to reach a safe target width.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Clear, written warning signs (severe chest pain, breathlessness, fever) and a number to call any time.
- A named route back into the service if swallowing tightens again.
- A reliable system for giving you biopsy results and explaining them.
- A plan for treating the underlying cause, such as acid suppression.
- Sensible advice on restarting eating, driving after sedation, and follow-up.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether a diagnostic gastroscopy is included in the same visit
- The endoscopist's fee and the unit or facility fee
- Throat spray versus sedation, and the team needed for monitoring
- Biopsies and the laboratory (histology) reporting
- Whether a steroid injection or extra equipment is used
- Follow-up appointments and any planned repeat dilatations
- Management of any complication, which may add significant cost
- The endoscopist's fee and the facility or unit fee
- Sedation and monitoring costs if you choose sedation
- Biopsy and histology (laboratory) charges
- Whether repeat dilatations are charged separately
- Follow-up consultation to discuss results
- Cancellation policy
- What happens, and what it costs, if a complication occurs or you need admission
On the NHS? Oesophageal dilatation is commonly provided on the NHS when a narrowing is causing swallowing problems; private treatment is mainly used for a faster appointment or a particular specialist.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not explaining that the narrowing often comes back and may need repeat stretches.
- Treating the symptom without confirming the cause with biopsies.
- No clear, written warning about perforation symptoms and what to do urgently.
- Glossing over sedation rules about driving and being alone for 24 hours.
- Implying the result is permanent or that it cures the underlying reflux or muscle problem.
Marketing red flags
- Describing it as a quick, no-risk stretch with no mention of perforation.
- Promising a permanent fix from a single dilatation.
- Not mentioning biopsies or the need to exclude cancer.
- Pushing private repeat stretches without discussing treating the cause.
- No clear plan for what happens if there is a complication.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- What is causing my narrowing, and have biopsies confirmed it is not cancer?
- How tight is the narrowing, and will you stretch it in one go or over several sessions?
- How likely is it to come back, and will I need repeat dilatations?
- What can be done to slow re-scarring, such as acid medicines or steroid injection?
- Exactly what symptoms after the procedure should make me seek urgent help?
- How experienced are you with dilatation, and what is your approach if there is a complication?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my procedure, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this procedure not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Is oesophageal dilatation available on the NHS?
Will it hurt?
Will I need it more than once?
Can the gullet tear?
When can I eat and drink again?
Can I drive home afterwards?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: BSG — UK guidelines on oesophageal dilatation in clinical practice NHS (Cambridge University Hospitals) — Gastroscopy with oesophageal dilatation NHS (Hull University Teaching Hospitals) — Oesophageal dilatation Endoscopic management of refractory benign oesophageal strictures — PMC NHS — Achalasia (a cause of oesophageal narrowing)
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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