Head and neck cancer radiotherapy
A planned course of radiation that aims to treat cancers of the mouth, throat, voice box, salivary glands or nearby areas, given as daily beams from outside the body.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Radiotherapy aims to treat cancers of the head and neck using planned radiation; it is a treatment, not surgery.
- It commonly affects the mouth, throat, taste, saliva and swallowing; some effects, such as a dry mouth, can be long-lasting.
- Eating and weight need active support, and some people need a feeding tube for a time; a dietitian and speech therapist are part of the team.
- Dental assessment before treatment matters, and good multidisciplinary aftercare is essential because of late effects.
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 treat head and neck cancer with the aim of cure, sometimes avoiding major surgery
Cancer that has spread widely may be treated with a different aim, so radical radiotherapy to cure may not be appropriate.
Soreness in the mouth and throat, taste changes and a drier mouth often begin. Swallowing can become harder, so nutrition and mouth-care support starts.
A named contact route and rapid access for swallowing, pain or feeding-tube problems.
Soreness in the mouth and throat, taste changes and a drier mouth often begin. Swallowing can become harder, so...
Mouth and throat reactions and skin soreness are usually at their worst around now and for a short time after...
Acute soreness gradually settles, swallowing often improves and energy slowly returns, though taste and saliva can...
Saliva may partly recover but can stay reduced. Late effects such as an underactive thyroid, jaw stiffness or neck...
What is head and neck cancer radiotherapy?
Head and neck cancer radiotherapy uses controlled doses of high-energy radiation to damage cancer cells in areas such as the mouth, tongue, throat, voice box, tonsils, salivary glands or nearby lymph nodes. It is a treatment, not an operation, so there is no surgical wound, although the skin in the treated area can react.
It may be the main treatment that aims to cure the cancer, often combined with chemotherapy (chemoradiotherapy). It may be given after surgery to lower the chance of the cancer coming back. Or it may be used with a different aim, such as shrinking a cancer or easing symptoms. Knowing which aim applies to you is important.
Because the head and neck contain many delicate structures close together, treatment is planned very carefully, and a fitted mask is used to keep your head still and accurate. Modern techniques such as IMRT shape the dose to protect healthy tissue like the salivary glands as much as possible.
Radiotherapy here can affect eating, swallowing, taste, saliva, the voice and the skin, and some effects can be long-lasting. Care is led by a multidisciplinary team (MDT) that includes a clinical oncologist, and usually a dietitian, speech and language therapist, and dental team, because supporting nutrition, swallowing and dental health is a core part of treatment.
In the UK, care for head and neck cancer follows national guidance from NICE and is delivered through specialist cancer teams, so what is recommended for you should be consistent with agreed national standards.
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.
Radical (curative) radiotherapy
Aims to cure cancer that has not spread far, often for cancers of the throat, voice box or tonsil. It can avoid major surgery in some sites but is an intensive course.
Chemoradiotherapy
Radiotherapy given together with chemotherapy to make it more effective for suitable cancers. It can improve control but tends to increase side effects, including more severe...
Adjuvant (after surgery) radiotherapy
Given after an operation to treat any remaining microscopic cancer and lower the risk of it returning, sometimes guided by what the pathology shows about margins or lymph...
Palliative radiotherapy
A shorter course used with the aim of shrinking cancer or easing symptoms such as pain or bleeding when cure is not the goal.
Preparing for your treatment
- See a clinical oncologist who explains the aim of treatment, the type of radiotherapy, whether chemotherapy is included, and the likely side effects.
- Have a dental check before treatment, as teeth may need attention first to reduce the risk of later jaw problems.
- Meet the dietitian to plan how to keep your weight and nutrition up, and discuss whether a feeding tube might be needed.
- Have a planning session with a CT scan, sometimes with an MRI, and a fitted mask made to keep your head still.
- Stop smoking and limit alcohol if you can, as both can worsen side effects and affect outcomes.
- Tell your team about diabetes, swallowing problems, dental work or any difficulty lying flat and still.
- Plan for daily travel across the course and for support at home as side effects build up.
- Ask about speech and swallowing support and any exercises to start before treatment.
What happens
You first have a planning session. A clear plastic mask is made by moulding warmed netting over your face and neck; it holds your head in exactly the same position each time. You then have a CT planning scan, sometimes with an MRI, in the mask. The team designs your individual plan over the following days.
Each treatment session is usually not painful and quick. You lie still in the mask while the machine delivers shaped beams; the radiographers leave the room but watch and talk to you. You do not become radioactive. Treatment is usually given once a day, Monday to Friday, over several weeks, with the exact number of sessions set by your plan.
Throughout the course you are seen regularly by the team. Side effects in the mouth and throat tend to build up from the first few weeks, so the dietitian, speech and language therapist and nursing team support your eating, swallowing, pain and mouth care, and some people need extra nutrition support or admission for part of the course.
Is this treatment 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…
- Cancer that has spread widely may be treated with a different aim, so radical radiotherapy to cure may not be appropriate.
- Some cancers are better treated primarily with surgery, depending on site and stage.
- Previous radiotherapy to the same area may make safe re-treatment difficult.
- Untreated dental disease may need addressing first to reduce the risk of later jaw-bone problems.
Delay or rearrange if…
- You have an active infection or unstable medical problem that needs treating first.
- Necessary dental work has not yet been done.
- Important staging scans or pathology results are still awaited.
- Your nutrition is very poor and needs supporting before an intensive course.
Alternatives to discuss
- Surgery as the main treatment for some cancers, sometimes with reconstruction.
- Chemotherapy or other drug treatments as part of a wider plan.
- Best supportive (palliative) care focused on symptoms where cure is not the aim.
- A different combination or sequence of treatments decided by the MDT.
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.
Benefits
- Can treat head and neck cancer with the aim of cure, sometimes avoiding major surgery
- Can be combined with chemotherapy to improve control in suitable cancers
- Can be used after surgery to lower the chance of the cancer returning
- Modern techniques shape the dose to protect saliva, swallowing and other functions as much as possible
- Can also relieve symptoms such as pain or bleeding when the aim is not cure
Risks & complications
- A sore mouth and throat with ulcers (mucositis) that builds up during treatment
- A dry mouth and thicker saliva, which may improve slowly but can be long-lasting
- Changes to taste, sometimes a metallic taste or food tasting bland
- Sore, red skin in the treated area and tiredness that builds up over the course
- Difficulty swallowing severe enough to need a feeding tube for a time
- Hoarseness or temporary voice loss when the voice box is treated
- Thrush (a mouth infection) during treatment
- Hair loss in the treated area, such as part of the beard, which can be permanent
- A permanently dry mouth when the salivary glands are unavoidably treated
- Stiffness of the jaw (trismus) or long-term swallowing problems
- An underactive thyroid developing months or years later
- Damage to the jaw bone (osteoradionecrosis), more likely after dental extractions, or, very rarely, a second cancer years later
The biggest uncertainties are how your mouth, saliva, taste, swallowing and voice will be affected, how much will recover, and whether the cancer is controlled. Dental health before treatment matters because jaw-bone problems are more likely after extractions. Tell your team about swallowing difficulties and weight loss early. Ask what the aim of treatment is, how your nutrition and swallowing will be supported, and which late effects to watch for.
Published figures to discuss
Side-effect and outcome rates vary widely with the type, site and stage of the cancer, whether chemotherapy is added, the dose and technique used, and factors such as smoking, alcohol and (for some throat cancers) HPV status. Reputable UK patient sources describe most side effects qualitatively rather than as single fixed percentages, and outcomes are assessed individually over time. We therefore describe risks in words rather than inventing exact figures.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Mucositis and painful swallowing during treatment | Common, often severe with chemoradiotherapy | Early pain control, mouth care, dietitian support and hydration reduce admissions and treatment breaks. | Guide sourcesClinical context |
| Feeding-tube requirement | Common in higher-dose head and neck radiotherapy, especially with chemotherapy | A tube may be temporary support rather than a sign treatment is failing. | Guide sourcesClinical context |
| Dry mouth and dental decay | Common long-term risk when salivary glands receive significant dose | Dental assessment, fluoride and lifelong mouth care are part of aftercare. | NICE NG36 — Cancer of the upper aerodigestive tract: assessment and management in people aged 16 and over (2016)nice.org.ukSource-linked context |
| Osteoradionecrosis of the jaw | Uncommon but serious, risk rises with dental extractions after high-dose jaw irradiation | Dental work should be optimised before treatment and coordinated afterwards. | NICE NG36 — Cancer of the upper aerodigestive tract: assessment and management in people aged 16 and over (2016)nice.org.ukSource-linked 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
Radiotherapy does not have a surgical recovery, but mouth and throat side effects usually peak towards the end of the course and in the couple of weeks afterwards before slowly improving. Some effects, such as a dry mouth, can persist, which is why ongoing support matters.
- Mouth and throat soreness that feels worse before it gets better at the end of the course
- A dry mouth and altered taste that improve slowly and may not fully return to normal
- Tiredness that lingers for several weeks after treatment finishes
- Skin in the treated area that settles over weeks, sometimes with a lasting change in colour or texture
Aftercare
- Follow your mouth-care routine and use any prescribed mouthwashes, gels or pain relief.
- Keep working with the dietitian to maintain weight and nutrition, using supplements or a feeding tube if advised.
- Sip fluids often and use saliva substitutes if your mouth stays dry.
- Care for the treated skin gently and avoid sun, harsh products and rubbing.
- Keep up any swallowing or jaw exercises the speech therapist recommends to reduce stiffness.
- Attend regular dental reviews, and tell any dentist you have had head and neck radiotherapy before extractions.
- Report a new lump, swallowing difficulty, voice change, or symptoms of an underactive thyroid.
- Dental assessment completed before treatment starts
- Dietitian plan in place, including feeding-tube discussion if relevant
- Soft, nourishing foods and supplements ready at home
- Mouth-care products and prescribed pain relief obtained
- Daily travel to the centre arranged for the whole course
- Speech and swallowing support contact noted
- Clinic out-of-hours number saved
⚠ Get urgent help if…
- Being unable to swallow fluids, or signs of dehydration
- A high temperature, shivering or feeling very unwell (possible infection)
- Severe mouth or throat pain not controlled by your prescribed pain relief
- Difficulty breathing or noisy breathing
- Heavy bleeding from the mouth or throat
- A feeding tube that comes out, blocks or looks infected
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
A good result means the cancer responds and is controlled, ideally while preserving as much swallowing, speech and saliva as possible. Response is assessed over weeks to months using examination and scans, not straight away, because the area continues to settle after treatment.
Radiotherapy cannot guarantee a cure, and it does not treat cancer outside the area that is planned and treated. Your team will explain how your response will be checked, what the scans mean, and what would happen if there were signs the cancer had not fully responded or had come back.
When the aim is cure, many people with head and neck cancer do well long term, but outcomes vary a lot by the type, site and stage of the cancer, factors such as HPV status in some throat cancers, and general health. Because some side effects and late effects can persist or appear over time, and because the risk of a new cancer is higher in people who smoke or drink heavily, long-term follow-up and healthy changes matter.
Related tests, treatments or support
Radiotherapy for head and neck cancer is often combined with chemotherapy (chemoradiotherapy) to improve control, and it is frequently used together with, or after, surgery. It is also combined with strong supportive care, including dietitian, speech and language therapy and dental input, which is a core part of treatment rather than an optional extra.
Follow-up & long-term care
After treatment you have regular reviews, often for several years, with examination and sometimes scans to check the cancer has responded and to manage side effects. Thyroid function is usually monitored because it can become underactive later. Dental follow-up is important. Many services use patient-initiated follow-up once you are stable, asking you to report new or returning symptoms such as a lump, pain, voice change or swallowing difficulty promptly.
- Regular dental reviews and careful dental care for life
- Thyroid blood tests to check for an underactive thyroid
- Ongoing swallowing and, if needed, jaw exercises
- Saliva substitutes or dry-mouth care if saliva stays reduced
- Support to stop smoking and limit alcohol to lower the risk of a new cancer
Repeat, follow-on and what comes next
- Response is assessed over weeks to months with examination and scans; a poor response or recurrence prompts further discussion about surgery or other treatment.
- Re-treating the same area with radiotherapy is often not possible, so options after relapse may differ from the first treatment.
- Some late effects, such as jaw stiffness, swallowing problems or an underactive thyroid, may need their own ongoing treatment.
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
- A named contact route and rapid access for swallowing, pain or feeding-tube problems.
- Coordinated dietitian, speech and language therapy and dental follow-up.
- A clear plan for assessing response, including scans and what a poor response would trigger.
- Monitoring for late effects such as an underactive thyroid, and coordination between private and NHS teams.
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 radiotherapy is given alone, with chemotherapy, or after surgery, and the number of sessions
- Planning scans (CT and sometimes MRI), the fitted mask and the physics planning
- Specialist supportive care such as dietitian, speech and language therapy and dental input
- The clinical oncologist's fees and the radiotherapy facility fees
- Any admission needed for nutrition or symptom support during the course
- Follow-up appointments, scans, thyroid monitoring and dental review
- The clinical oncologist's fees and the radiotherapy facility fees
- Planning scans, the mask and the physics planning
- Whether chemotherapy and its costs are included if you are having chemoradiotherapy
- Dietitian, speech therapy and dental input before, during and after treatment
- Any feeding-tube placement or admission that may be needed
- Follow-up appointments, scans and thyroid monitoring
- What happens, and who pays, if you develop a complication or need further treatment
On the NHS? Head and neck cancer radiotherapy is a standard NHS treatment when clinically indicated; private care may be used for speed or a second opinion and is coordinated with NHS specialist teams.
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 being clear whether the aim is cure, lowering risk after surgery, or easing symptoms.
- Underplaying long-term effects on saliva, taste, swallowing, the voice or the jaw.
- No dental assessment or clear nutrition plan before an intensive course.
- Not explaining the added side effects of combining chemotherapy with radiotherapy.
- No discussion of alternatives such as surgery or supportive care.
Marketing red flags
- Promoting a particular machine or technique as a guaranteed cure or as side-effect free.
- Naming a branded system as automatically superior without discussing your individual cancer.
- Skipping the role of dietitian, speech therapy and dental care in the plan.
- Downplaying the burden of an intensive course or of chemoradiotherapy.
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.
- Is the aim of my radiotherapy to cure, to lower the risk of return after surgery, or to ease symptoms?
- Will I have chemotherapy as well, and how does that change the side effects?
- How will my eating, weight and swallowing be supported, and might I need a feeding tube?
- What are the chances of a long-term dry mouth, and how will you try to protect my saliva?
- What dental care do I need before and after treatment?
- Which late effects should I watch for, and how will my thyroid and recovery be monitored?
- 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 treatment, 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 treatment 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 head and neck radiotherapy available on the NHS?
Will I be able to eat during treatment?
Will my dry mouth and taste come back to normal?
Why do I need a mask, and does treatment hurt?
Why is a dental check needed first?
Will I be radioactive or a danger to my family?
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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: Cancer Research UK — Head and neck radiotherapy side effects Macmillan — Head and neck radiotherapy side effects Macmillan — Dry mouth after head and neck cancer treatment Cancer Research UK — Radiotherapy for mouth and oropharyngeal cancer side effects Cancer Research UK — Radiotherapy side effects for laryngeal cancer NICE NG36 — Cancer of the upper aerodigestive tract: assessment and management in people aged 16 and over (2016) The Royal College of Radiologists — Radiotherapy dose fractionation, third edition (2019)
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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