Acid Reflux (Gastroesophageal Reflux Disease, GERD)

Frequent reflux of stomach contents into the esophagus, causing heartburn and regurgitation. Untreated, it can damage the esophagus and lead to Barrett's esophagus.

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Overview

GERD is defined as the condition that develops when reflux of stomach contents into the esophagus causes troublesome symptoms, complications, or both — and, importantly, tissue injury is not required to meet the definition (Shaheen et al., American College of Physicians Best Practice Advice, 2012). It is one of the most common gastrointestinal disorders in the world, with a prevalence of roughly 18–28% in North America, and as many as 40% of U.S. adults report some reflux symptoms, with 10–20% symptomatic weekly or more often (Argüero & Sifrim, Nature Reviews Gastroenterology & Hepatology, 2024; Shaheen et al., American College of Physicians, 2012).

Find Your Path: Two Routes Through Reflux Care

The right evaluation and the right operation depend on one question first: have you had bariatric surgery? Start with the route that fits you.

Route 1: Reflux without prior bariatric surgery

Confirm it is reflux. Before any procedure, objective testing (upper endoscopy, pH monitoring, esophageal manometry and imaging) confirms reflux and rules out look-alikes such as achalasia. See how anti-reflux surgery is chosen.
Medication comes first. Most people start with lifestyle changes and acid-suppressing medication. Procedures are considered when symptoms persist, medication causes problems, or you do not want lifelong treatment. See refractory GERD and non-erosive reflux disease.
Choosing a procedure. Options include Nissen, Toupet and Dor fundoplication, LINX, TIF, Stretta, and hiatal hernia repair. The choice is matched to your anatomy and esophageal function.
If you also have obesity. Gastric bypass is often the better antireflux operation, because it treats reflux and weight together.
If a previous reflux operation failed. See failed fundoplication, recurrent hiatal hernia and revisional foregut surgery.

Route 2: Reflux after bariatric surgery

After a sleeve gastrectomy. Start with reflux after sleeve gastrectomy. Depending on the cause, options include hiatal hernia repair after sleeve, ligamentum teres cardiopexy, or conversion to gastric bypass.
After a gastric bypass. New reflux or swallowing problems often come from a hernia or an ulcer. See hiatal hernia repair after bypass and marginal ulcer revision.
After a one-anastomosis (mini) gastric bypass. See bile reflux and OAGB revision for bile reflux.
How the decision is made. Choosing between medication, hernia repair and conversion depends on your weight and BMI, response to medication, metabolic disease, hiatal hernia, and esophageal motility, and is best made after a multidisciplinary evaluation (Kumar et al., SAGES Guideline, Surgical Endoscopy, 2024).

Not sure which route fits? Start with a virtual consultation, and read the reflux surgery guide to see what happens before and after surgery.

Your reflux team

Dr. de la Cruz-Muñoz performs much of his own diagnostic and therapeutic endoscopy, and works closely with a gastroenterologist who specializes in esophageal motility. The two worked together for seven years at the University of Miami, and Dr. de la Cruz-Muñoz helped recruit this specialist to HCA Florida Mercy Hospital. Testing, interpretation and surgery happen within one coordinated team, which is what the most complicated reflux patients, including those whose previous reflux or bariatric operations have failed, need most.

GERD is best understood not as a single disease but as a spectrum with multiple phenotypes (Katz et al., ACG Clinical Guideline, 2022). Between 50% and 85% of patients have non-erosive reflux disease (normal-appearing esophagus on endoscopy), while others have erosive esophagitis or the long-term complications of chronic reflux (Shaheen et al., American College of Physicians, 2012). Most patients are managed effectively with lifestyle measures and acid-suppressing medication. However, patients with persistent or medication-dependent symptoms, severe regurgitation, a significant hiatal hernia, or complications such as severe esophagitis or Barrett's esophagus are candidates for evaluation for antireflux surgery, which can provide durable, medication-free control of the disease (Fuchs et al., Surgical Endoscopy, 2014; Fass, New England Journal of Medicine, 2022).

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Causes

Acid reflux is fundamentally a failure of the antireflux barrier — the valve mechanism where the esophagus meets the stomach. This barrier is formed by the lower esophageal sphincter (LES) and the crural diaphragm working together as a unit (Katz et al., ACG Clinical Guideline, 2022).

Reflux occurs through four main mechanisms (Mittal & Vaezi, New England Journal of Medicine, 2020):

• Transient lower esophageal sphincter relaxations — brief, inappropriate openings of the valve, the dominant cause of reflux in people without a hiatal hernia and a normal response to stomach distention that becomes problematic when too frequent.

• A weak (hypotensive) lower esophageal sphincter — chronically low valve pressure that allows acid to escape.

• A sliding hiatal hernia — when part of the stomach slides up through the diaphragm into the chest, separating the two components of the antireflux barrier and markedly increasing reflux (Maret-Ouda et al., JAMA, 2020).

• Previous upper stomach or esophageal surgery — operations involving the upper stomach, gastroesophageal junction, or esophagus can alter normal anatomy and impair the antireflux barrier. Patients who have undergone procedures such as gastrectomy or surgery for stomach tumors may develop severe reflux, difficulty swallowing, bile reflux, or dumping syndrome as a result of these changes.

See how revisional gastric bypass resolved these symptoms in Dayami S.'s patient testimonial.

The problem is worsened when the esophagus clears acid poorly (impaired peristalsis), when saliva and protective secretions are reduced, or when the stomach empties slowly — all of which prolong the esophagus's exposure to acid (Katz et al., 2022).

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Risk Factors

The major, well-established risk factors for developing GERD are (Maret-Ouda et al., JAMA, 2020; Katzka & Kahrilas, BMJ, 2020):

• Obesity and increased waist circumference — one of the strongest and most modifiable risk factors; abdominal fat mechanically raises the pressure pushing stomach contents into the esophagus (Pletch & Lidor, 2024).

• Tobacco smoking — lowers LES pressure and worsens symptoms.

• Genetic predisposition / family history.

• Hiatal hernia.

• Older age and male sex — particularly relevant to the risk of esophageal complications such as adenocarcinoma.

• Pregnancy — through both hormonal effects and increased intra-abdominal pressure.

• Dietary and lifestyle factors — alcohol, large or late meals, and certain trigger foods (fatty foods, chocolate, peppermint) that reduce LES pressure.

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How It Affects the Body

When refluxed acid, and sometimes bile and digestive enzymes, repeatedly contacts the esophageal lining, it triggers the release of inflammatory signals (cytokines and chemokines) that recruit inflammatory cells and can both damage the mucosa and generate symptoms (Katz et al., ACG Clinical Guideline, 2022). GERD is now understood as a multisystem disorder rather than a purely local problem: its effects can extend from the brain (where central sensitization and hypervigilance amplify symptom perception) down to the esophagus and stomach (Argüero & Sifrim, Nature Reviews Gastroenterology & Hepatology, 2024).

Because the esophagus sits next to the airway and the heart, reflux can affect organs beyond the digestive tract. This explains why GERD can present not only as heartburn but as chronic cough, hoarseness, asthma-like symptoms, dental erosion, and chest pain that can mimic heart disease (Fass et al., Nature Reviews Disease Primers, 2021; Katz et al., 2022).

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Complications

Left untreated, chronic acid reflux can progress to a series of increasingly serious esophageal complications (Maret-Ouda et al., JAMA, 2020; Fass et al., 2021):

Erosive esophagitis — inflammation and ulceration of the esophageal lining.
Esophageal (peptic) stricture — scarring and narrowing that causes difficulty swallowing.
Barrett esophagus — a precancerous transformation of the lining, present in roughly 6–8% of GERD patients.
Esophageal adenocarcinoma — the most feared complication; an individual with typical reflux symptoms carries about a fivefold increased risk of developing this cancer, though overall mortality from GERD remains rare (Katzka & Kahrilas, BMJ, 2020).

The progression from chronic reflux to Barrett esophagus to adenocarcinoma is the central reason that persistent symptoms — and especially alarm symptoms — warrant proper evaluation rather than indefinite self-treatment.

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Symptoms and Signs

The two classic, most specific symptoms of GERD are (Katz et al., ACG Clinical Guideline, 2022):

Heartburn — a burning sensation rising from behind the breastbone up toward the neck.

Regurgitation — the effortless return of stomach contents upward toward the mouth, often with an acid or bitter taste.

Other esophageal symptoms include chest pain (which can be indistinguishable from cardiac pain), difficulty swallowing (dysphagia), painful swallowing, water brash, and belching (Fass et al., Nature Reviews Disease Primers, 2021).

Extraesophageal signs — which are real but far less specific — include chronic cough, hoarseness, throat clearing, laryngitis, and worsening asthma. Because these have poor sensitivity and specificity for reflux, GERD should not be diagnosed on these symptoms alone (Katz et al., 2022).

Alarm ("red flag") symptoms that demand prompt endoscopy include difficulty swallowing, painful swallowing, unintentional weight loss, loss of appetite, gastrointestinal bleeding, and vomiting (Fass, New England Journal of Medicine, 2022).

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Diagnosis

There is no single gold-standard test for GERD; the diagnosis rests on a combination of symptoms, response to therapy, endoscopy, and reflux monitoring (Katz et al., ACG Clinical Guideline, 2022). The typical pathway is:

Clinical diagnosis and empiric PPI trial — in patients with classic heartburn and regurgitation and no alarm symptoms, a trial of a proton pump inhibitor (PPI) is both treatment and a practical diagnostic test. However, this approach is imperfect, with a pooled sensitivity of about 78% and specificity of only 54% against objective testing (Katz et al., 2022).

Upper endoscopy (EGD) — indicated for patients with alarm symptoms, those who do not respond to treatment, and those at higher risk for Barrett esophagus or adenocarcinoma (older age, male sex, obesity) (Maret-Ouda et al., JAMA, 2020). It directly assesses for esophagitis, strictures, and Barrett esophagus.

Ambulatory reflux (pH or impedance-pH) monitoring — used when the diagnosis is unclear or symptoms are refractory. Patients without previously documented GERD are tested off therapy; those with established GERD and refractory symptoms are tested on therapy (Fass, New England Journal of Medicine, 2022).

Esophageal manometry — assesses esophageal motility and is particularly important before any antireflux surgery and to exclude motility disorders that mimic GERD.

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Differential Diagnosis

Because reflux symptoms are nonspecific, several other conditions must be considered and can coexist with or mimic GERD (Katz et al., ACG Clinical Guideline, 2022; Roman et al., Yamada's Textbook of Gastroenterology, 2022):

Cardiac disease — coronary artery disease must be excluded in any patient with chest pain before attributing it to reflux.

Eosinophilic esophagitis — especially in younger patients with dysphagia and food impaction.

Achalasia and other esophageal motility disorders.

Functional heartburn and reflux hypersensitivity — symptoms without abnormal acid exposure; these often respond poorly to acid suppression.

Peptic ulcer disease and dyspepsia.

Rumination syndrome.

Paraesophageal hernia.

Pulmonary and ENT causes of chronic cough and hoarseness.

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Lifestyle Modifications

Lifestyle and dietary change is the foundation of GERD management and the recommended first-line approach (Steinman, American Geriatrics Society Beers Criteria, 2025). Evidence-supported measures include (Katz et al., ACG Clinical Guideline, 2022; Sugerman, JAMA, 2014):

Weight loss for patients who are overweight or have obesity — one of the most effective interventions, because it reduces the intra-abdominal pressure driving reflux; reductions in weight and waist circumference are directly associated with symptom improvement (Pletch & Lidor, Current Gastroenterology Reports, 2024; Pugliese et al., Clinical Gastroenterology and Hepatology, 2026).

Smoking cessation — in a cohort study, successful quitters had a 44% improvement in symptoms versus 18% in those who continued (Katz et al., 2022).

Elevating the head of the bed and avoiding sleeping on the right side for nocturnal symptoms.

Avoiding late meals and bedtime snacks — not eating within 2–3 hours of lying down.

Staying upright during and after meals, and avoiding large meals.

Limiting trigger foods and drinks — alcohol, chocolate, peppermint, high-fat foods, and, for some individuals, coffee, citrus, carbonated, and spicy foods.

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Treatment Options

GERD treatment escalates based on severity, phenotype, and response (Maret-Ouda et al., JAMA, 2020; Fass, New England Journal of Medicine, 2022):

Proton pump inhibitors (PPIs) — the most effective medical therapy and the cornerstone of treatment (e.g., omeprazole, esomeprazole). Standard care is initial full-dose therapy, then stepping down to the lowest effective dose; uncomplicated GERD responsive to 8 weeks of PPI can often have therapy discontinued or used on demand. Patients with severe (LA grade C or D) erosive esophagitis should remain on long-term PPI therapy to maintain healing, as nearly all relapse without it (Katz et al., ACG Clinical Guideline, 2022).
H2-receptor antagonists and alginate/antacid agents — useful for breakthrough or nocturnal symptoms and for step-down therapy.
Antireflux surgery (fundoplication) — wrapping the upper stomach around the lower esophagus to reconstruct the valve; an effective option in selected patients, particularly those who are young and otherwise healthy, or who do not wish to take lifelong medication (Maret-Ouda et al., 2020).
Magnetic sphincter augmentation and endoscopic therapies — newer, less invasive options (e.g., transoral incisionless fundoplication, Stretta) for appropriately selected patients (Slater et al., Multi-society consensus/SAGES, Surgical Endoscopy, 2023).
Weight-loss (bariatric) surgery — for patients with obesity and GERD, this treats the disease at its root. The multi-society consensus conference conditionally recommends that patients with obesity and GERD be offered Roux-en-Y gastric bypass (RYGB) or fundoplication, and that those with a BMI over 50 or severe comorbid disease undergo RYGB (Pletch & Lidor, Current Gastroenterology Reports, 2024). Gastric bypass is the single most reflux-friendly weight-loss operation: it reduces acid production, diverts bile, and lowers the pressure across the gastroesophageal junction, substantially improving symptoms (Pugliese et al., Clinical Gastroenterology and Hepatology, 2026). A systematic review found roughly half of patients experience improvement or resolution of reflux after RYGB with a low rate of new reflux (Sargsyan et al., Obesity Surgery, 2025).

A critical, evidence-based caveat for any patient with obesity and reflux: sleeve gastrectomy can cause or worsen GERD. In the SLEEVEPASS trial, up to 50% of patients with preoperative reflux symptoms had worse symptoms after sleeve gastrectomy, compared with under 10% after bypass (Pletch & Lidor, 2024). The Oseberg randomized trial confirmed sleeve gastrectomy confers a substantially higher risk of acid reflux and new-onset esophagitis than bypass, often in patients without symptoms (Lorentzen et al., Gastroenterology, 2021). A recent network meta-analysis likewise ranked RYGB highest for reflux remission, while sleeve gastrectomy was most likely to require postoperative PPIs and cause esophagitis (Xing et al., World Journal of Gastroenterology, 2026). This is precisely why reflux status must guide the choice of weight-loss procedure.

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When to See a Doctor

Medical evaluation is appropriate for anyone with frequent reflux symptoms — generally mild symptoms occurring two or more days per week, or moderate-to-severe symptoms more than once a week — or whose symptoms are not controlled by over-the-counter measures (Fass et al., Nature Reviews Disease Primers, 2021). Patients who have been self-treating with antacids or acid reducers for more than a couple of weeks should be assessed rather than continuing indefinitely.

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When to Seek Treatment

Prompt or urgent evaluation is warranted when any alarm symptom is present, because these can signal a stricture, bleeding, or malignancy (Fass, New England Journal of Medicine, 2022):

Difficulty or pain with swallowing

Unintentional weight loss or loss of appetite

Vomiting, or vomiting blood

Black or bloody stools / signs of gastrointestinal bleeding

Anemia

New reflux symptoms beginning at an older age

Chest pain should always be treated as potentially cardiac until proven otherwise — reflux is a diagnosis of exclusion in that setting. Long-standing reflux, particularly in patients who are older, male, or carry excess weight, is also an indication to seek evaluation for Barrett esophagus screening.

If reflux or swallowing problems return after anti-reflux surgery, see failed fundoplication. If food sticks when you swallow, see dysphagia (difficulty swallowing); in younger adults with allergies, eosinophilic esophagitis is a common cause that can mimic reflux.

Long‑Term Outlook

GERD is best understood as a long-term condition requiring individualized, sometimes lifelong management, with therapy periodically re-evaluated to use the lowest effective dose (Fass, New England Journal of Medicine, 2022). The key to altering the long-term trajectory — rather than simply controlling symptoms year after year — is addressing the underlying cause. For patients whose reflux is driven by obesity, meaningful, sustained weight loss can fundamentally change the disease: it lowers intra-abdominal pressure, reduces acid exposure, and improves or resolves symptoms (Pugliese et al., Clinical Gastroenterology and Hepatology, 2026; Pletch & Lidor, Current Gastroenterology Reports, 2024). In well-selected patients with obesity and reflux, Roux-en-Y gastric bypass offers the opportunity to treat both conditions at once, with durable improvement in reflux and the broad metabolic benefits of weight loss — while the data make clear that sleeve gastrectomy is generally the wrong choice when significant reflux is present (Lorentzen et al., Gastroenterology, 2021; Xing et al., World Journal of Gastroenterology, 2026). Lifelong follow-up, and in appropriate patients endoscopic surveillance for Barrett esophagus, remains an important part of the long-term plan.

More Foregut and Reflux Conditions

Explore related topics in our foregut patient library: PPI-Refractory GERD, Non-Erosive Reflux Disease (NERD), Erosive Esophagitis, Hiatal Hernia & Paraesophageal Hernia, Achalasia and Gastroparesis. For an overview of surgical options, see anti-reflux surgery and hiatal and paraesophageal hernia repair.

Prognosis

For most people, GERD is a chronic but highly manageable condition, and serious outcomes are uncommon with appropriate care (Katzka & Kahrilas, BMJ, 2020). Symptoms respond well to lifestyle change and acid-suppression therapy in the majority of patients. However, GERD tends to recur: two-thirds of patients with non-erosive disease relapse when PPIs are stopped, and nearly all patients with severe erosive esophagitis relapse within six months without maintenance therapy (Katz et al., ACG Clinical Guideline, 2022). The prognosis is most favorable when modifiable drivers — especially excess weight and smoking — are addressed, because these target the cause rather than only the symptom.

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Why Choose Dr. de la Cruz‑Muñoz

Dr. Nestor de la Cruz-Muñoz is a board-certified minimally invasive surgeon whose practice centers on advanced foregut and anti-reflux surgery, hiatal hernia repair and complex revisional operations, backed by extensive experience in bariatric and metabolic surgery. Anti-reflux and hiatal hernia surgery is the operation he performs most often. That combination matters, because acid reflux sits at the intersection of gastroenterology, foregut surgery and metabolic surgery. Most patients are offered acid-suppressing pills indefinitely without anyone addressing why the reflux is happening, and for the large number of patients whose reflux is driven by excess weight, that root cause is both identifiable and treatable.

He evaluates reflux comprehensively — including the upper GI and endoscopic assessment and, when needed, manometry and pH testing that determine the correct treatment — and performs the full range of options, from antireflux procedures to the weight-loss operations that treat obesity-related GERD at its source. That experience includes knowing when reflux makes a Roux-en-Y gastric bypass the right operation and a sleeve gastrectomy the wrong one — a distinction supported by the highest-quality randomized and network-meta-analytic evidence and one that directly protects patients from worsening their reflux. Every treatment plan is matched to the individual's anatomy, reflux severity, weight, and metabolic health, with the goal of lasting reflux control rather than indefinite symptom suppression.

Dr. de la Cruz-Muñoz has performed more than 15,000 minimally invasive procedures over more than 25 years in practice, including complex foregut, hernia, gallbladder and abdominal operations as well as bariatric surgery.

If you live in South Florida and are considering reflux surgery in Miami, our local page explains how reflux is evaluated and treated at our practice.