A sore throat that won’t go away is behaving differently from an ordinary one, and the difference tells you something. Viral sore throats peak around day two or three and are gone inside a week. Strep throat responds to antibiotics within 48 hours. If you’re into week three, week six, or — as a lot of people reading this will be — month four, the cause isn’t an infection that’s overstaying its welcome. It’s something that keeps irritating the tissue, day after day.

In adults with no fever, no swollen glands and no improvement on antibiotics, the most commonly missed explanation is laryngopharyngeal reflux — silent reflux. Stomach contents reach the throat, the enzyme pepsin lodges in the tissue, and the irritation renews itself faster than the tissue can heal. It’s called silent because it usually skips heartburn entirely, which is exactly why it gets overlooked for months.

That said, a persistent sore throat has a handful of other real causes, and one specific pattern — pain consistently on one side — needs a doctor rather than a self-management plan. I’ll cover that early.

Key Takeaways

A sore throat lasting beyond two to three weeks is no longer an infection question — it’s an ongoing-irritation question.
Silent reflux (LPR) is the most frequently missed cause, and a sore throat for weeks with no other symptoms is close to a textbook description of it.
Pepsin, not acid, is why the soreness persists between reflux episodes — the enzyme sits in throat tissue and reactivates whenever something acidic passes.
A normal laryngoscopy and a failed course of proton pump inhibitors are both consistent with LPR rather than evidence against it.
A sore throat that is persistently and clearly one-sided is a recognized red flag and needs assessment, not a home protocol.
Antibiotics that didn’t help are useful information: most sore throats are viral, and even when bacteria are involved the benefit is modest and short-lived.
Cough plus sore throat for weeks usually means one of three things: reflux, post-nasal drip, or a cough reflex that has become sensitized after a viral illness.
Night-time soreness that’s worst on waking points strongly at reflux, mouth breathing, or both.

When a Sore Throat Has Gone On Long Enough to Take Seriously

Rough timelines worth holding in your head:

Under a week: almost always viral. Nothing to investigate.
One to three weeks: still usually a slow-resolving viral illness or post-viral irritation, particularly if you had a cold.
Three weeks or more: something is maintaining it. This is where reflux, drip, dryness and voice use start to dominate the picture.
Six weeks or more with any red flag: get assessed properly.

The red flags that change the urgency, whatever the duration:

Pain consistently on one side only
Progressive difficulty swallowing, or food sticking
A lump in the neck you can feel
Unexplained weight loss
Coughing up blood, or blood in saliva
Hoarseness lasting more than three weeks
Persistent ear pain on one side with a normal-looking ear

None of those mean something sinister is happening — most turn out to be benign. They mean the question is worth answering with a camera rather than a diary.

Sore Throat for Weeks With No Other Symptoms

This is the presentation I see most often in the people who write to me, and it deserves its own section because it’s so consistently misread.

No fever. No swollen glands. No cold. Nobody else in the house is ill. Your throat has simply been sore — or raw, or scratchy, or burning — for weeks, and every test comes back clean. The GP, entirely reasonably, finds nothing to treat.

That combination is close to a textbook description of laryngopharyngeal reflux. In the landmark series that first mapped out reflux-related throat disease, nearly all affected patients presented with throat and voice symptoms while only a small minority reported any heartburn at all Koufman, The Laryngoscope, 1991. In other words, the absence of classic reflux symptoms isn’t evidence against reflux — in the throat-based form, it’s the norm.

Three features make the case stronger:

It fluctuates. Better some days, much worse after certain meals or a late dinner. Infections don’t do that.
It’s worse on waking, or in the evening, rather than constant through the day.
It comes with at least one of: throat clearing, a lump sensation, mucus you can’t shift, a voice that tires, or an unexplained cough.

If two or three of those fit, take the Reflux Symptom Index — the nine-item questionnaire validated for exactly this, where a score above roughly 13 is considered abnormal Belafsky et al., Journal of Voice, 2002. It takes two minutes and it’s the single most useful thing you can bring to an appointment.

What “Chronic Sore Throat” Actually Means

The word chronic does a lot of quiet work here. It doesn’t mean severe, and it doesn’t mean permanent. It means the irritation is being renewed faster than the tissue heals.

Throat lining turns over quickly — it’s built to recover from the daily insults of eating, talking and breathing. A sore throat becomes chronic when something interrupts that recovery on a daily basis. So the useful question is never “what infection is this?” but “what is happening to my throat every single day?”

The realistic list of daily irritants:

Refluxed stomach contents, including pepsin and bile as well as acid
Mucus draining from the nose and sinuses
Dry air and mouth breathing, especially overnight
Repeated throat clearing, which is itself a mechanical injury
Smoke, vaping aerosol, and occupational dusts or fumes
Voice overuse, particularly loud talking over background noise

Most people with a persistent sore throat have two or three of these running at once, which is why single-intervention fixes so often disappoint.

Why Silent Reflux Is the Most Missed Cause

Classic GERD burns in the chest because acid pools in the lower esophagus. LPR behaves completely differently: brief, upright, often daytime episodes that travel the whole way up and land on tissue that has almost none of the esophagus’s defenses. Small volume, big reaction — and frequently no chest symptoms at all. I’ve written a full comparison of how GERD and LPR differ, and the full list of LPR symptoms.

Why the Soreness Doesn’t Switch Off Between Episodes

If reflux were only acid, your throat would hurt during episodes and recover in between. The reason it doesn’t is pepsin — the stomach’s protein-digesting enzyme, which travels up with the refluxate and binds to throat tissue.

Pepsin stays active up to about pH 6.5, and remains recoverable rather than destroyed after neutralization up to pH 7.5, only becoming irreversibly inactive at pH 8.0 Johnston et al., The Laryngoscope, 2007. It’s also taken inside throat cells by receptor-mediated endocytosis, where it causes damage even at neutral pH by reactivating within the cell Johnston et al., Annals of Otology, Rhinology & Laryngology, 2010.

The practical consequence is the thing that makes this condition so confusing to live with. The enzyme is already in your throat. Every acidic coffee, juice, soda or vinaigrette can wake it up again — no new reflux episode required. That’s why the soreness seems to have a life of its own, and why it flares hours after something you ate.

Why Your Scope Was Normal and Your PPIs Didn’t Work

Two findings that get read as “it’s not reflux” are, in fact, entirely compatible with it.

A normal-looking larynx is common, because the changes in LPR are often subtle and the visual scoring systems have real limitations. And proton pump inhibitors underperform badly in throat symptoms: in a multicenter randomized trial of esomeprazole 40 mg twice daily versus placebo for 16 weeks in chronic posterior laryngitis, the primary symptom resolved in 14.7% on the drug versus 16.0% on placebo, with no significant difference on any secondary endpoint Vaezi et al., The Laryngoscope, 2006.

That result makes perfect sense once you know about pepsin. Acid suppression raises the pH of what refluxes; it doesn’t remove the enzyme, and it doesn’t stop the reflux events happening. More on why PPIs so often fail for LPR.

Chronic Sore Throat on One Side

This section is different from the others. If your sore throat is persistently and clearly one-sided, see a doctor — and say the words “one-sided” when you book.

Most causes of a persistent sore throat are diffuse. Reflux irritates the whole posterior throat. Post-nasal drip runs down both sides. Dryness affects everything. So a symptom that stays reliably on the left or the right is a genuine outlier, and unilateral throat pain is a recognized head and neck cancer warning sign — one that researchers have specifically argued should be included in urgent referral criteria Allam et al., International Journal of Otolaryngology, 2019.

I want to be clear about proportion here: the large majority of one-sided sore throats turn out to be benign. Tonsil stones, chronic tonsillitis affecting one tonsil, a dental problem, a styloid or muscular issue, or referred pain from the neck are all far more common than anything serious. But “far more common” isn’t a reason to wait it out, and this is one symptom where the cost of being wrong is high.

Take it more seriously still, and sooner, if it comes with any of: persistent ear pain on the same side with a normal ear examination, a lump in the neck, difficulty or pain on swallowing that is worsening, unexplained weight loss, or a history of smoking or heavy alcohol use. Those add up.

Get it looked at. If it’s benign — and it usually is — you’ll have removed the worry, which is worth something on its own.

Cough and Sore Throat for Weeks

When a cough and a sore throat persist together for weeks, there are three realistic explanations, and they can coexist.

Reflux. Refluxate reaching the larynx triggers the cough reflex directly, and the cough then irritates the throat mechanically. It’s typically a dry, tickly, throat-level cough rather than a chesty one, and it’s often worse after meals, on lying down, or when talking. See reflux cough for the full picture.

Post-nasal drip. Mucus draining onto the throat provokes both clearing and coughing. Upper airway cough syndrome secondary to rhinosinus disease is one of the most common causes of chronic cough in adults, and is often diagnosed by response to treatment rather than by any specific test Pratter, Chest, 2006.

A sensitized cough reflex. After a viral illness, the nerve endings in the airway can stay hypersensitive for months. The original infection is long gone; the reflex hasn’t reset. This is the one that responds least well to reflux treatment and most to time plus deliberate cough-suppression technique.

Worth noting: the cough and the soreness feed each other. Every cough abrades the throat, and a sore throat lowers the threshold for coughing. Breaking that loop matters as much as treating the underlying cause — the same approach I describe for stopping constant throat clearing works for cough suppression too.

Chronic Sore Throat With Post-Nasal Drip

If your throat is sore and you’re constantly aware of mucus at the back of it, drip is probably contributing. Reflux and drip aren’t rivals here — they overlap heavily, and a meta-analysis found a significant association between chronic rhinosinusitis and reflux disease in adults Aldajani et al., American Journal of Rhinology and Allergy, 2024.

The quick way to tell them apart: drip is usually worse in the morning and when your nose is blocked, improves with nasal treatment, and comes with sneezing or congestion. Reflux-driven mucus tends to track with meals and position, and often comes with a lump sensation rather than a runny nose. I’ve covered the overlap properly in silent reflux and post-nasal drip, and the mucus side specifically in reflux and mucus.

Chronic Sore Throat and Ear Pain

Ear pain alongside a persistent sore throat, with an ear that looks completely normal, is almost always referred pain — the throat and the ear share nerve supply, so irritation in one is felt in the other. Reflux can drive it, and pepsinogen has been detected in middle ear fluid, linking reflux to middle ear disease Al-Saab et al., Journal of Otolaryngology Head & Neck Surgery, 2008.

Two things to hold onto. Bilateral or alternating ear pain with a sore throat is usually benign referred pain. Persistent one-sided ear pain with a normal ear examination belongs in the red-flag section above and should be assessed. Full detail in acid reflux and ear pain.

Persistent Sore Throat After Antibiotics

A sore throat that didn’t respond to antibiotics is genuinely useful diagnostic information, and it’s worth understanding why rather than assuming you need a stronger prescription.

Most sore throats are viral, so antibiotics have nothing to act on. Even when bacteria are involved the effect is modest and short-lived: the Cochrane review found antibiotics reduced throat soreness at day three (risk ratio 0.70), but by one week 82% of untreated participants were symptom-free anyway, pushing the number needed to treat to 18 Spinks et al., Cochrane Database of Systematic Reviews, 2021. They’re given mainly to reduce complications in higher-risk cases, not to fix the soreness.

So if a course of antibiotics made no difference, the most likely conclusion is that bacteria were never the problem — which points you back toward the chronic-irritant list. It also means a second or third course is unlikely to help, and worth questioning.

One footnote: some people feel worse after antibiotics for reasons unrelated to the throat, including gut disruption and, occasionally, oral thrush — which can itself cause a persistently sore throat and is easily treated once it’s recognized.

Chronic Sore Throat at Night and on Waking

If your throat is fine by mid-afternoon and reliably sore at bedtime or first thing in the morning, the timing is the diagnosis.

Two things happen overnight. Gravity stops helping with reflux, and you swallow very little saliva while asleep — so every reflux episode lasts considerably longer than it would in the day. Separately, mouth breathing dries the throat directly, and dry throat tissue is both more uncomfortable and more vulnerable.

What helps, in order of impact:

Nothing to eat in the three hours before bed. The highest-yield change there is.
Raise the head of the bed 6–8 inches with risers or a wedge — not stacked pillows, which increase abdominal pressure.
Sleep on your left side, which keeps the junction above the pool of stomach contents.
An alginate at bedtime. A randomized trial of Gaviscon Advance in 49 LPR patients found significantly better Reflux Symptom Index and Reflux Finding Scores than untreated controls McGlashan et al., European Archives of Oto-Rhino-Laryngology, 2009.
Address nasal blockage so you’re not mouth breathing all night.

More on nighttime reflux and the best sleeping position for silent reflux.

Other Persistent Sore Throat Reasons

Beyond reflux and drip, these are the causes worth checking off.

Tonsil stones and chronic tonsillitis. Often one-sided, often with bad breath and a gritty sensation. See reflux and tonsil stones and reflux and bad breath.
Allergic rhinitis. Seasonal or exposure-linked, with itch and sneezing. Easily confused with LPR — see LPR versus allergies.
Dryness and dehydration. Air conditioning, central heating, long flights, and medications with drying effects. Related: reflux and dry mouth.
Voice overuse. Teachers, salespeople, call handlers, singers. Typically worse at the end of a working day and better on a quiet weekend, often with a tired voice — see reflux and hoarseness.
Smoking and vaping. Both directly irritate the throat and worsen reflux by relaxing the lower sphincter. Vaping is covered in vaping and acid reflux.
Thyroid disease. Occasionally produces throat discomfort and pressure — see thyroid problems and reflux.
Eosinophilic esophagitis. More often causes food sticking than soreness, but belongs on the list — see EoE versus acid reflux.
Chronic laryngitis. The inflammatory end-state of several of the above — see reflux and chronic laryngitis.

How to Tell Whether Yours Is Reflux

Before spending money on anything, run a two-week diary. Record when the soreness is worst, what you’d eaten in the previous three hours, how much you’d talked, and how your nose was behaving. Patterns show up faster than you’d expect.

Worse after meals, in the evening, or on waking → reflux
Worse with a blocked nose, better on nasal treatment → drip
Worse after heavy talking, better on quiet days → voice
Worse in dry environments, better with humidity and fluids → dryness
Unvarying, one-sided, or with any red flag → get it examined

Then, if reflux looks likely, run a genuine trial: four to six weeks of smaller meals, low acidity between meals, nothing within three hours of bed, bed elevation and an alginate at night. That combination isn’t guesswork — a strict low-acid diet produced dramatic symptom improvement in patients with stubborn laryngopharyngeal reflux Koufman, Annals of Otology, Rhinology & Laryngology, 2011, and a later comparison found a plant-based Mediterranean-style diet with alkaline water performed at least as well as proton pump inhibition for LPR symptoms Zalvan et al., JAMA Otolaryngology–Head and Neck Surgery, 2017. Most people who are going to respond will have noticed a change by then. If nothing has shifted at all, that’s meaningful too, and it’s the point to push for a laryngoscopy and a proper reflux work-up.

If you’d rather not assemble that trial yourself, the Wipeout Diet Plan sets out the whole protocol — what to eat, what to drink between meals, and the timing and night-time mechanics — in the order I’d actually do it.

One realistic expectation to set: throat tissue that’s been irritated for months does not settle in a fortnight. Even with everything right, meaningful improvement usually takes six to twelve weeks — I’ve set out the typical healing timeline for a reflux sore throat separately, because unrealistic expectations are the main reason people abandon a plan that was working.

Conclusion

A sore throat that won’t go away has stopped being an infection story and become an irritation story. Once you see it that way, the path forward is clearer: find what’s hitting the tissue every day and stop it, rather than reaching for another course of antibiotics that were never going to help. For a large share of people — especially those with weeks of soreness and no other symptoms, no fever and no swollen glands — that daily irritant is silent reflux, with pepsin sitting in the tissue and reactivating every time something acidic goes past.

Which is why the fix is a dietary and behavioral one more than a pharmaceutical one. Fewer reflux events, less pepsin reactivation, protected nights, and a throat that finally gets consecutive days to heal. That’s what the Wipeout Diet Plan is built to do — the complete protocol I put together over twelve years of managing this myself, focused on reducing how often reflux happens rather than treating it after it arrives. It was designed around LPR, the throat-based form that responds worst to acid suppression, but it works just as well for GERD and ordinary heartburn because the mechanisms are the same.

If you want somewhere lighter to start, the Wipeout Food Reference Guide is the essential companion — the foods and drinks that matter for acid reflux and LPR with their pH values, which is the quickest way to stop unknowingly reactivating pepsin several times a day.

And keep the one-sided rule in mind. A diffuse, fluctuating sore throat is worth working on patiently at home. A sore throat that has stayed on one side is worth a doctor’s appointment this week.

This article is general information, not medical advice. A sore throat lasting more than three weeks should be assessed by a doctor.

Frequently Asked Questions

How long is too long for a sore throat?

Beyond two to three weeks, a sore throat is no longer behaving like an infection and something is maintaining it. Beyond six weeks, or at any point with red flags such as one-sided pain, difficulty swallowing, a neck lump, weight loss or blood in saliva, it needs medical assessment rather than more waiting.

Can acid reflux cause a sore throat with no heartburn?

Yes — that’s the defining feature of laryngopharyngeal reflux. The refluxate travels past the esophagus quickly and lands on throat tissue that has far fewer defenses, so you get throat symptoms without chest symptoms. In the original series describing the condition, only a small minority of patients reported heartburn at all.

Why won’t my sore throat go away even with antibiotics?

Most sore throats are viral, so antibiotics have nothing to act on, and even in bacterial cases the benefit is short-lived — by one week most untreated people are symptom-free anyway. A sore throat that didn’t respond to antibiotics is more likely being maintained by an ongoing irritant — reflux, post-nasal drip, dryness or voice use — than by an infection that needs a stronger drug.

Should I worry about a sore throat on one side only?

You should get it checked, without panicking about it. Most one-sided sore throats are benign — tonsil stones, one-sided tonsillitis, dental or referred pain. But persistent unilateral throat pain is a recognized head and neck cancer warning sign, and it’s one of the few throat symptoms where waiting has a real downside.

Why is my throat sore only at night or in the morning?

Lying flat removes gravity’s help with reflux, and you swallow very little saliva while asleep, so each episode lasts longer. Mouth breathing dries the tissue on top of that. The combination is why night and early morning are the worst times for so many people with chronic throat symptoms.

Can a chronic sore throat cause ear pain?

Yes. The throat and ear share nerve supply, so throat irritation is commonly felt in the ear even though the ear itself is healthy. Reflux is one recognized driver. Bilateral or alternating ear pain is usually benign referred pain; persistent one-sided ear pain with a normal ear examination should be assessed.

How long does a reflux sore throat take to heal?

Longer than most people expect. Tissue irritated for months generally needs six to twelve weeks of consistent change before it feels reliably better, and improvement tends to arrive as fewer bad days rather than a sudden switch. Abandoning a plan at three weeks is the most common reason people conclude it didn’t work.

Research & References

[Koufman, The Laryngoscope, 1991] — Landmark series establishing laryngopharyngeal reflux as a distinct entity, in which patients presented overwhelmingly with throat and voice symptoms while only a small minority reported heartburn, and laryngeal tissue was shown to be far more vulnerable to acid and pepsin injury than esophageal tissue.
[Johnston et al., The Laryngoscope, 2007] — Characterized human pepsin’s pH behavior: active up to about pH 6.5, inactive but recoverable after neutralization up to pH 7.5, and irreversibly inactivated at pH 8.0.
[Johnston et al., Annals of Otology, Rhinology & Laryngology, 2010] — Showed pepsin is taken into hypopharyngeal cells by receptor-mediated endocytosis and causes damage even at neutral pH by reactivating inside the cell.
[Vaezi et al., The Laryngoscope, 2006] — Multicenter randomized trial of esomeprazole 40 mg twice daily versus placebo for 16 weeks in chronic posterior laryngitis: the primary symptom resolved in 14.7% on esomeprazole versus 16.0% on placebo, with no significant difference in laryngoscopic scores or any secondary endpoint.
[Belafsky et al., Journal of Voice, 2002] — Developed and validated the Reflux Symptom Index, a nine-item self-administered questionnaire (each item 0–5, maximum 45) for laryngopharyngeal reflux, with scores above about 13 considered abnormal.
[Allam et al., International Journal of Otolaryngology, 2019] — Examined whether persistent unilateral sore throat should be included in NICE two-week-wait urgent referral criteria for suspected head and neck cancer, arguing the symptom carries sufficient risk to warrant urgent assessment.
[Spinks et al., Cochrane Database of Systematic Reviews, 2021] — Systematic review of antibiotics for sore throat in children and adults: antibiotics reduced throat soreness at day three (risk ratio 0.70, 95% CI 0.60–0.80), but 82% of untreated participants were symptom-free by one week, giving a number needed to treat of 18 at that point, alongside modest reductions in complications such as acute otitis media and quinsy.
[Pratter, Chest, 2006] — Evidence-based clinical practice guideline on chronic upper airway cough syndrome secondary to rhinosinus disease, previously termed postnasal drip syndrome, noting it is among the most common causes of chronic cough and is typically confirmed by response to treatment.
[Aldajani et al., American Journal of Rhinology and Allergy, 2024] — Systematic review and meta-analysis finding a significant association between chronic rhinosinusitis and reflux disease in adults.
[Al-Saab et al., Journal of Otolaryngology Head & Neck Surgery, 2008] — Detected pepsinogen in adenoid tissue and middle ear fluid, linking laryngopharyngeal reflux to otitis media with effusion.
[McGlashan et al., European Archives of Oto-Rhino-Laryngology, 2009] — Randomized trial of Gaviscon Advance in 49 patients with laryngopharyngeal reflux; the treated group had significantly better Reflux Symptom Index and Reflux Finding Scores than untreated controls.
[Koufman, Annals of Otology, Rhinology & Laryngology, 2011] — Reported dramatic symptom improvement in patients with recalcitrant laryngopharyngeal reflux following a strict low-acid diet.
[Zalvan et al., JAMA Otolaryngology–Head and Neck Surgery, 2017] — Comparison of alkaline water plus a plant-based Mediterranean-style diet and reflux precautions against proton pump inhibition found the dietary approach was not significantly worse than medication for LPR symptoms.

David Gray

12 years living with LPR · Consultant & researcher

Every claim sourced to peer-reviewed research Editorial policy

I've lived with LPR for twelve years — the misdiagnoses, the PPI courses that did nothing, the slow work of figuring out what actually helps. Wipeout Reflux is where I translate the research into plain terms for people stuck in the same place. Every claim here is sourced to peer-reviewed work, and I consult one-to-one with LPR sufferers.

View all articles by David Gray

Sore Throat That Won’t Go Away? Why It Could Be Silent Reflux