Why Acid Reflux Doesn’t Always Cause Heartburn

By Dr Vyas M.N. Prasad, FRCS (ORL-HNS) — Consultant Otolaryngologist & Head and Neck Surgeon, Camden Medical Centre, Singapore

Laryngopharyngeal reflux — where stomach contents reach the throat and voice box — frequently occurs without heartburn, which is why it is so often missed or misdiagnosed. The characteristic symptoms are throat clearing, chronic cough, globus sensation, and hoarseness rather than the burning chest discomfort of typical gastro-oesophageal reflux, and treatment requires both dietary modification and acid suppression over a sustained period.

• Many patients with laryngopharyngeal reflux (LPR) experience no heartburn at all — only throat symptoms

• Common presentations include chronic throat clearing, persistent cough, hoarseness, and a lump sensation

• This "silent reflux" is frequently missed or attributed to other causes

• An ENT specialist is often better placed than a gastroenterologist to identify and manage this pattern

One of the most common reasons patients come to see me having already seen their GP, a gastroenterologist, or an allergist — without a clear answer — is a persistent throat symptom that nobody has been able to explain. A constant need to clear the throat. A voice that gives out by the afternoon. A cough that has been going on for months. A feeling of something stuck in the throat that no amount of swallowing resolves.

In many of these patients, the cause is laryngopharyngeal reflux — LPR — and the reason it has been missed is straightforward: they have no heartburn. Without that cardinal symptom, reflux often does not feature in the differential diagnosis. But LPR is not the same condition as gastro-oesophageal reflux disease (GORD), and understanding the difference is the key to getting the right diagnosis and the right treatment.

What Is Laryngopharyngeal Reflux?

In gastro-oesophageal reflux disease, stomach acid travels up the oesophagus and causes the familiar burning sensation in the chest — heartburn. The oesophagus has some capacity to tolerate intermittent acid exposure; the discomfort arises when that capacity is exceeded.

Laryngopharyngeal reflux is a related but distinct condition. In LPR, stomach contents — acid, pepsin, and sometimes bile — travel further up the oesophagus and reach the throat and voice box.

The larynx and pharynx are far more sensitive to acid than the oesophagus. Even very small, brief episodes of reflux reaching these structures can cause significant irritation and inflammation — often without the patient experiencing any chest discomfort at all.

This is the central paradox of LPR: the symptoms are felt entirely in the throat, and the patient — and often their doctor — may not connect them to reflux at all.

Symptoms of LPR

The symptoms of LPR are throat symptoms, not chest symptoms. The most common are:

Chronic throat clearing — the single most characteristic symptom of LPR. Patients describe a constant need to clear mucus or irritation from the throat, often without any mucus actually being present. The sensation is caused by irritation of the laryngeal mucosa rather than excess secretions.

Hoarseness or a change in voice quality — particularly noticeable in the morning, or worsening through the day with voice use. Reflux reaching the vocal folds causes inflammation and swelling that alters how they vibrate.

Globus sensation — the feeling of a lump, tightness, or something stuck in the throat, persistent even when swallowing is not painful. This is one of the most anxiety-provoking symptoms I see in clinic, because patients often fear a serious underlying cause. In the majority of cases, LPR or globus pharyngeus — a closely related functional condition — is responsible.

Chronic cough — a persistent dry cough, often worse after meals or when lying down, that does not respond to the usual treatments for respiratory causes. LPR is one of the three most common causes of chronic cough, alongside asthma and post-nasal drip.

Post-nasal drip sensation — a sensation of mucus dripping from the back of the nose into the throat. In many cases, this sensation is actually caused by laryngeal irritation from reflux rather than genuinely increased nasal secretions.

Voice fatigue — the voice tires more quickly than usual, particularly in people who use their voice professionally — teachers, lawyers, performers, and anyone who speaks extensively during the day.

Difficulty swallowing — a mild sense that food or liquids are not passing smoothly, or a vague discomfort on swallowing. Significant pain on swallowing is not typical of LPR and warrants further investigation.

Why LPR Is So Easily Missed

LPR is missed for several reasons, and understanding them may help patients who have been searching for an answer for some time.

No heartburn — as discussed, the absence of the classic GORD symptom means reflux is often not considered. The throat symptoms are attributed instead to post-nasal drip, allergies, asthma, or anxiety — and treated accordingly, without improvement.

Normal gastroscopy — patients who do undergo upper gastrointestinal endoscopy may be told that everything looks normal. A normal gastroscopy does not exclude LPR; the damage in LPR is primarily in the larynx and pharynx, not the stomach or oesophagus, and a gastroscopy does not assess these structures.

Symptoms that mimic other conditions — the chronic cough of LPR is indistinguishable clinically from the cough of asthma or post-nasal drip. Hoarseness can be attributed to overuse or a respiratory virus. Throat clearing is often dismissed as habitual.

The reflux episodes are brief and non-acidic — some LPR is caused by weakly acidic or non-acid reflux, which does not register on standard pH monitoring and can be difficult to confirm even with investigation.

How LPR Is Diagnosed

There is no single definitive test for LPR. Diagnosis is primarily clinical — based on the pattern of symptoms and the findings on laryngoscopy.

Laryngoscopy is the key investigation. Using a flexible endoscope passed through the nose, I can examine the throat, voice box, and the area around the laryngeal inlet directly. In LPR, characteristic findings include redness and swelling of the posterior larynx, thickening of the tissue at the back of the voice box, and sometimes mild oedema of the vocal folds. These findings are not always dramatic — which is why the clinical history is so important alongside the examination.

The Reflux Symptom Index (RSI) is a validated nine-question questionnaire that quantifies symptom burden and helps track response to treatment. A score above 13 is considered suggestive of LPR.

pH-impedance monitoring — a 24-hour study in which a thin probe is placed in the oesophagus to record acid and non-acid reflux events — is sometimes used in complex or treatment-resistant cases to confirm the diagnosis objectively. It is not required in every patient.

Empirical treatment — in many cases, a trial of treatment is both diagnostic and therapeutic. If symptoms improve significantly with acid suppression and dietary modification, this strongly supports LPR as the diagnosis.

Treatment of LPR

LPR responds to treatment, but it requires patience — the larynx is slow to heal, and meaningful improvement typically takes eight to twelve weeks of consistent management. This is considerably longer than the course of treatment usually prescribed for heartburn, and many patients stop treatment too early and conclude that it has not worked.

Dietary and lifestyle modification

Dietary triggers play an important role in LPR. The most significant include:

• Caffeine — coffee, tea, and caffeinated soft drinks relax the lower oesophageal sphincter, facilitating reflux

• Alcohol — particularly wine and spirits, which also relax the sphincter and are directly irritating to the laryngeal mucosa

• Acidic foods and drinks — citrus fruits, tomatoes, fizzy drinks, and vinegar-based foods

• Fatty and fried foods — delay gastric emptying and increase reflux

• Mint and chocolate — both relax the oesophageal sphincter

• Spicy food — a direct laryngeal irritant

Eating habits matter as much as food choices. Eating large meals, eating within three hours of lying down, and eating quickly all increase reflux frequency. Elevating the head of the bed by 15 to 20 centimetres reduces overnight reflux significantly in many patients.

Weight loss in overweight patients can make a substantial difference to both reflux frequency and severity.

Acid suppression

Proton pump inhibitors (PPIs) — omeprazole, lansoprazole, and related medications — reduce the acidity of stomach contents and are the mainstay of pharmacological treatment. For LPR, they are typically prescribed at twice-daily dosing — morning and evening, 30 minutes before meals — for a minimum of eight to twelve weeks.

H2 blockers are sometimes used as an alternative or adjunct, particularly for managing late-evening reflux before sleep.

It is worth noting that PPIs reduce acid but do not eliminate reflux episodes — they make the refluxate less damaging to the laryngeal mucosa. Dietary and lifestyle modification is therefore not optional; it is an integral part of treatment.

Voice therapy

For patients in whom LPR has caused significant voice symptoms or habitual throat clearing, voice therapy with a specialist speech and language therapist can be extremely helpful. A therapist experienced in laryngeal conditions can help patients modify vocal behaviours that perpetuate laryngeal irritation — in particular, the habit of forceful throat clearing, which itself traumatises the vocal folds and sustains the inflammatory cycle.

When symptoms persist

A proportion of patients do not respond adequately to the above measures. In these cases, the diagnosis should be reconsidered — are there other contributors to the throat symptoms that have been overlooked? — and further investigation such as pH-impedance monitoring may be warranted. Referral to a gastroenterologist for consideration of anti-reflux procedures is occasionally appropriate for carefully selected patients with confirmed severe reflux.

LPR and the Globus Sensation

The globus sensation — the feeling of a persistent lump or tightness in the throat — deserves a specific mention because it is so commonly caused by LPR, and so commonly misattributed to anxiety or a sinister underlying cause.

The sensation arises from laryngeal and pharyngeal irritation caused by reflux, which triggers muscle tension and hypersensitivity in the throat. It is not caused by an actual mass or obstruction — something I always confirm on examination before reassuring the patient — but it is nonetheless a very real and often distressing symptom.

It responds to the same treatment as other LPR symptoms: acid suppression, dietary modification, and time. I have a detailed post on globus pharyngeus and its relationship to LPR which goes into this further.

When to See an ENT Specialist

I would recommend seeking an ENT assessment if you have:

• Persistent hoarseness lasting more than three weeks

• A chronic unexplained cough that has not responded to other treatment

• A persistent sensation of a lump in the throat

• Difficulty swallowing — particularly if progressive

• Throat symptoms that are affecting your voice professionally or socially

• Symptoms that have not improved after a trial of dietary modification and acid suppression

If you have persistent throat clearing, hoarseness, or a lump sensation without heartburn, Dr Vyas Prasad can assess you for LPR — book here.

An ENT assessment adds value because laryngoscopy directly visualises the larynx and excludes other causes of throat symptoms — including, importantly, lesions of the vocal folds that can present with hoarseness and should not be missed.

If you would like a specialist assessment for throat symptoms or suspected LPR, please contact us at Camden Medical Centre to arrange a consultation with Dr Vyas Prasad.