GERD & Acid Reflux: Causes & Foods to Avoid

Alarm Symptoms Need Urgent EndoscopyDifficulty swallowing (dysphagia), persistent vomiting, unintentional weight loss, vomiting blood, or new heartburn over age 55: these require urgent upper GI endoscopy to exclude cancer.

Quick answer

GERD affects 20–30% of Western adults and is highly treatable — but persistent symptoms need investigation. The oesophagus lacks the stomach's protective mucus layer, so repeated acid exposure causes genuine damage, including Barrett's oesophagus in about 10% of long-term sufferers.

What GERD is

Gastro-oesophageal reflux disease (GORD in the UK, GERD in the USA) occurs when stomach acid — and sometimes bile and pepsin — refluxes into the oesophagus. The lower oesophageal sphincter normally maintains a pressure barrier; GERD results from sphincter dysfunction (reduced resting pressure or transient relaxations), increased intra-abdominal pressure from obesity or pregnancy, or impaired oesophageal clearance.³

Repeated acid exposure causes a ladder of damage: oesophagitis (inflammation and erosion, graded A–D), stricture formation (scarring that causes difficulty swallowing), and Barrett's oesophagus — intestinal metaplasia of the lining, a pre-malignant condition conferring a 0.2–0.5% annual risk of oesophageal cancer.⁵

GERD: myths vs facts

Heartburn folklore is extensive. Here is what the evidence says:

MYTH Heartburn is just a nuisance, not real damage.

FACT The oesophagus lacks the stomach's protective mucus layer, so repeated acid exposure causes genuine injury: oesophagitis, strictures and Barrett's oesophagus. Persistent reflux deserves investigation, not just antacids.

MYTH It does not matter how you take your PPI.

FACT If a PPI has been prescribed for you, timing affects how well it works: PPIs are designed to be taken before the first meal of the day, and taking them with food reduces their effect — a common reason people assume the medicine is not working. How long to continue, and when to step down, is a decision to make with your doctor.

MYTH Blood tests diagnose GERD.

FACT Diagnosis is clinical or endoscopic. Routine blood tests do not diagnose reflux but exclude contributing conditions: FBC for iron deficiency anaemia (suggesting occult upper GI bleeding), H. pylori testing (it causes ulcer disease that worsens reflux), and coeliac serology (coeliac disease impairs gastric motility).

MYTH Long-term PPIs are always unsafe.

FACT PPIs are generally safe long-term; beyond a year they are associated with lower B12 and magnesium absorption, managed with the lowest effective dose and annual review. In confirmed Barrett's oesophagus, long-term high-dose PPI is actually recommended regardless of symptoms, as acid suppression may slow dysplasia progression.²

MYTH Surgery is the only fix when tablets fail.

FACT Management is a ladder: lifestyle measures, antacids, H2 blockers, PPIs — and only then laparoscopic fundoplication, reserved for refractory GERD or those refusing lifelong PPIs. Most people never need the surgical rung.

What to do next

Match your situation to the next step — alarm features change the urgency completely:

Your situation	Sensible next step	When to seek care promptly
Typical heartburn, no alarm features	Lifestyle first: elevate the bed head 15–20 cm, avoid trigger foods, lose weight if overweight, eat smaller meals, do not lie down for 3 hours after eating. If your doctor suggests a PPI trial, ask about the correct timing relative to meals.	If symptoms persist beyond 8 weeks of treatment.
Any alarm feature (see table below)	Urgent upper GI endoscopy within 2 weeks (NICE NG12): difficulty swallowing, painful swallowing, unintentional weight loss, vomiting blood, iron deficiency anaemia, or new reflux after age 55.
Chronic cough, hoarseness or asthma-like symptoms	Consider reflux as the cause; ask your doctor whether a trial of acid-suppression therapy is appropriate — it can be both diagnostic and therapeutic.	If breathing is affected, seek prompt assessment.
Confirmed Barrett's oesophagus	Stay on long-term PPI as advised and attend endoscopic surveillance every 2–5 years (interval depends on segment length and dysplasia).	New difficulty swallowing or weight loss between surveillance visits.
On long-term PPI (over a year)	Annual review: lowest effective dose, and discuss B12 and magnesium monitoring with your doctor.	Severe diarrhoea, fractures, or new neurological symptoms — discuss promptly.

Common dietary triggers — high-fat foods, chocolate, peppermint, coffee, alcohol, carbonated drinks, tomatoes and citrus, and late meals — relax the sphincter, stimulate acid or raise gastric pressure. Identifying your personal triggers matters more than following a generic banned list.

Alarm features needing urgent endoscopy

NICE guidelines recommend urgent upper GI endoscopy (within 2 weeks) for reflux symptoms with any of these:

Alarm feature	Why it matters
Dysphagia (difficulty swallowing)	May indicate stricture or cancer
Odynophagia (painful swallowing)	Suggests severe oesophagitis or ulceration
Unintentional weight loss	Red flag for malignancy
Haematemesis (vomiting blood or coffee-ground material)	Upper GI bleeding
Iron deficiency anaemia	Suggests chronic occult blood loss
New reflux or dyspepsia after age 55	Higher background risk of oesophageal/gastric cancer

Practical notes

A short symptom diary is very useful: what you ate, portion sizes, meal timings, when symptoms start, and whether they disturb sleep. Note also how you respond to medicines. This record often reveals patterns — late dinners, for instance — that are easier to act on than general advice.

Tell your doctor about all your medicines, since several common ones can worsen reflux. More importantly, report alarm features promptly: difficulty swallowing, unexplained weight loss, vomiting blood, black stools, or persistent vomiting. These change the plan and should not wait for the next routine visit.

The lifestyle measures doctors discuss most are meal timing (avoiding late heavy meals), smaller portions, weight management where relevant, and raising the head of the bed. Smoking and alcohol commonly aggravate symptoms. Discuss which of these are worth trying before assuming medicines alone will fix things.

Treatment is usually reviewed after 4–8 weeks: if symptoms persist despite proper treatment, your doctor may suggest endoscopy or other testing rather than simply continuing the same prescription. Long-term acid suppression is also reviewed periodically — ask about the plan at each visit.

In India

In India, an upper GI endoscopy typically costs around ₹3,000–₹8,000 at private hospitals, though prices vary by city and facility. 24-hour pH monitoring, where available, is a specialised test that can cost ₹8,000–₹15,000 — ask for a written estimate, since it is not offered everywhere.

Endoscopy quality depends on the centre and the gastroenterologist, so a reputed hospital matters more than the lowest price. For blood tests that sometimes accompany the workup, choose a NABL-accredited lab — and the reference range printed on your own report is the one that counts.

Frequently asked questions

How is GERD diagnosed?

Usually it is a clinical diagnosis, based on typical symptoms responding to acid suppression. 24-hour ambulatory pH monitoring is the gold standard for confirming reflux. Upper GI endoscopy is used if alarm features are present or treatment fails — to check for oesophagitis, stricture or Barrett's oesophagus.

Are PPIs safe for long-term use?

PPIs are generally safe for long-term use, but use beyond a year is associated with reduced vitamin B12 and magnesium absorption, increased fracture risk and C. difficile diarrhoea. The guidance is the lowest effective dose with annual review — except in confirmed Barrett's oesophagus, where long-term high-dose PPI therapy is recommended regardless of symptom control.

What is Barrett's oesophagus?

A pre-malignant condition in which chronic acid reflux replaces the normal oesophageal lining with intestinal-type cells. It carries a 0.2–0.5% annual risk of developing oesophageal cancer and requires endoscopic surveillance every 2–5 years depending on segment length and dysplasia grade; high-grade dysplasia needs endoscopic eradication therapy.

Can GERD cause a chronic cough or hoarseness?

Yes. Extra-oesophageal reflux causes hoarseness, chronic cough, laryngitis and asthma-like symptoms — reflux is an underappreciated cause of persistent cough. A trial of high-dose acid suppression for 8 weeks is both diagnostic and therapeutic. Discuss persistent respiratory symptoms with your doctor rather than assuming they are a separate chest problem.

I feel better — can I stop my acidity tablets?

Discuss it with your doctor first. Stopping suddenly can cause rebound acidity, and symptoms may return if the underlying pattern has not changed. Doctors often plan a taper or on-demand strategy — ask what approach suits your situation rather than stopping on your own.

Is surgery an option for reflux?

Anti-reflux surgery exists, but it is reserved for selected cases — for example, when medicines do not work or are not tolerated — and it has its own risks and trade-offs. It is not a first-line or cosmetic choice. Discuss with your gastroenterologist whether you are even a candidate.

Why are my symptoms worst at night?

Lying flat makes it easier for stomach acid to flow back, so night-time symptoms are typical — especially after a late or heavy dinner. Earlier lighter dinners and raising the head of the bed often help. If nights remain bad despite this, discuss it with your doctor.

Can stress cause my reflux?

Stress does not cause the underlying reflux, but it can make you more aware of symptoms and worsen gut sensitivity — which is why symptoms often flare during tense periods. Managing stress is reasonable alongside medical treatment. Discuss persistent symptoms with your doctor either way.

References

Sources cited on this page. PubMed links open the original abstract.

Katz PO, Gerson LB, Vela MF. Guidelines for the diagnosis and management of gastroesophageal reflux disease. Am J Gastroenterol. 2013;108(3):308–328. PMID 23419381 · doi:10.1038/ajg.2012.444
Iwakiri K, Fujiwara Y, Manabe N, et al. Evidence-based clinical practice guidelines for gastroesophageal reflux disease 2021. J Gastroenterol. 2022;57(4):267–285. PMID 35226174 · doi:10.1007/s00535-022-01861-z
Savarino EV, Bredenoord AJ, Fox M, et al. Expert consensus document: Advances in the physiological assessment and diagnosis of GERD. Nat Rev Gastroenterol Hepatol. 2017;14(11):665–676. PMID 28951582 · doi:10.1038/nrgastro.2017.130
Lenglinger J, Riegler M, Cosentini E, et al. Review on the annual cancer risk of Barrett's esophagus in persons with symptoms of gastroesophageal reflux disease. Anticancer Res. 2012;32(12):5465–5473. PMID 23225453
Gastroesophageal Reflux Disease. In: StatPearls. Treasure Island (FL): StatPearls Publishing. NCBI Bookshelf NBK554462

Medical Disclaimer: This page is for general education only and does not replace professional medical advice. Always consult a qualified healthcare provider.

GERD / Acid Reflux: Managing Heartburn and Oesophageal Damage