Gastroesophageal Reflux Disease and Reflux Esophagitis

Etiology and Risk Factors

Obesity, pregnancy, and hiatal hernia can increase reflux burden in adults (Mills & Ciorba, 2019; Norris, 2020).

Epidemiology and Clinical Context

Population context: Regurgitation in infancy is often physiologic; poor growth, hematemesis, dysphagia, respiratory compromise, or feeding aversion requires a different assessment than uncomplicated infant spit-up (Mills & Ciorba, 2019; Norris, 2020).

Pathophysiology

Mechanism: barrier failure, impaired clearance, and mucosal injury

• Transient lower esophageal sphincter relaxations, a hypotensive LES, or altered anatomy such as hiatal hernia permit reflux across the esophagogastric junction.
• Increased gastric distension or intra-abdominal pressure may increase reflux events. Ineffective esophageal peristalsis and reduced salivary buffering prolong mucosal exposure.
• Acid and pepsin are important injurious constituents; refluxate may also contain bile. Recurrent contact disrupts mucosal defenses and promotes inflammatory injury.
• Repeated injury and healing can produce ulceration and fibrotic narrowing. Chronic injury may be associated with intestinal metaplasia (Barrett esophagus), which increases esophageal adenocarcinoma risk (Mills & Ciorba, 2019).

Mechanism matters: Proton pump inhibitors reduce gastric acid secretion and promote esophagitis healing; they do not directly prevent all reflux events. Persistent regurgitation despite acid suppression therefore does not always mean inadequate acid suppression.

Clinical Manifestations

Manifestations and clinical distinctions

• Typical: postprandial or recumbent heartburn, sour regurgitation, and retrosternal burning.
• Possible complications: dysphagia from peptic stricture, erosive esophagitis, bleeding, and Barrett esophagus.

Diagnostic Evaluation

For uncomplicated typical symptoms, diagnosis is frequently clinical. Consider upper endoscopy for dysphagia, gastrointestinal bleeding, unexplained weight loss, iron-deficiency anemia, persistent vomiting, or suspected erosive/structural complications. Endoscopy documents mucosal disease but a normal result does not exclude pathologic reflux. Ambulatory reflux monitoring, sometimes incorporating impedance, can help establish reflux burden and symptom association when diagnosis is uncertain or symptoms persist despite appropriately selected therapy (Brumbaugh et al., 2025; Jameson et al., 2020).

Choose objective testing according to the unanswered question

In typical uncomplicated heartburn, empiric acid suppression may be reasonable; refractory symptoms, consideration of an invasive antireflux procedure, or an uncertain GERD diagnosis require greater diagnostic discrimination. When GERD has not been objectively established, reflux monitoring is generally performed off suppressive therapy to document abnormal acid exposure. When established GERD persists despite optimized twice-daily proton pump inhibitor therapy, impedance-pH monitoring on treatment can assess ongoing acid or nonacid reflux and symptom association. Endoscopy evaluates erosions, strictures and alternate disorders, but normal mucosa does not exclude GERD (Katz et al., 2022; Rej et al., 2023).

Expected Findings

Severe erosive esophagitis and peptic stricture provide stronger objective evidence of GERD than nonspecific erythema. Barrett esophagus evaluation is based on a combination of chronic reflux and additional risk factors rather than endoscopy for every patient with heartburn; any surveillance strategy depends on confirmed histology and dysplasia risk. Reassess adherence and premeal PPI administration before labeling treatment failure.

Differential Diagnosis

GERD versus key alternatives

Finding	Think beyond routine GERD when …
Dysphagia to solids and liquids	Achalasia or another esophageal motility disorder is plausible.
Food impaction, atopic history	Eosinophilic esophagitis warrants consideration.
Rapidly progressive dysphagia or marked weight loss	Cancer or other mechanical obstruction must be excluded.
Burning chest pain with exertion or associated cardiopulmonary symptoms	Evaluate acute coronary or other serious thoracic causes first.
Persistent heartburn despite a reasonable treatment course	Check diagnosis, adherence, medication timing, reflux burden, and functional esophageal syndromes.

Diagnostic Limitations and Reassessment

• Cough, hoarseness, wheeze, or laryngeal symptoms may coexist with reflux; these findings alone do not establish GERD as the cause.

Treatment and Management

• Individualize weight management when relevant, meal timing, recumbency after eating, nighttime measures, and avoidance of reproducible dietary triggers rather than imposing blanket restrictions.
• For an adult with classic heartburn or regurgitation and no alarm features, an eight-week trial of a once-daily PPI before a meal is guideline-supported. If symptoms resolve and no ongoing indication exists, attempt discontinuation. PPIs generally heal erosive esophagitis more effectively than histamine-2 receptor antagonists; for continued therapy, reassess indication and the lowest effective regimen. For most PPIs, schedule the dose 30–60 minutes before a meal rather than at bedtime, accounting for formulation-specific exceptions (Katz et al., 2022).
• In infants without GERD complications, emphasize assessment of feeding volume and technique and avoid reflexive medication use. Manage suspected complicated pediatric GERD according to age and clinical findings.
• Escalate to specialty evaluation for refractory symptoms, significant regurgitation, recurrent aspiration concern, strictures, or consideration of an antireflux procedure; objective evidence and esophageal motility assessment matter before procedural treatment.

Complications and Red Flags

• New or concerning chest pain requires consideration of cardiac and other urgent etiologies before attributing symptoms to reflux (Jameson et al., 2020).

Children compared with adults

Group	Typical pattern	Diagnostic and treatment implications
Infants	Effortless regurgitation is often physiologic, particularly in an otherwise thriving infant.	Review feeding patterns, growth, examination, and red flags. Do not treat isolated uncomplicated spit-up with routine acid suppression. Maintain established safe-sleep recommendations, including supine sleep.
Older children and adolescents	Heartburn, regurgitation, or dysphagia may resemble adult presentations.	Evaluate persistent or complicated symptoms; consider eosinophilic esophagitis, structural conditions, and targeted endoscopy or pH-impedance testing when indicated.
Adults	Heartburn and regurgitation predominate; obesity, hiatal hernia, and recurrent nocturnal symptoms may contribute.	Typical symptoms without alarm features often permit a time-limited acid-suppressive trial. Alarm symptoms, suspected complications, or diagnostic uncertainty change the testing pathway.

In infants, bilious emesis, gastrointestinal bleeding, poor growth, significant distension, neurologic abnormalities, or systemic illness require evaluation for diagnoses other than simple physiologic reflux. A contrast upper GI series is used to evaluate suspected anatomy, not to establish GERD. Routine endoscopy is not necessary for every child with reflux (Brumbaugh et al., 2025).

Infant safety distinction

Physiologic infant regurgitation without distress, feeding dysfunction or growth faltering generally does not warrant acid suppression. Conservative feeding adjustments should not compromise nutrition; all infants should continue to sleep supine on a flat, safe surface, even with reflux. Bilious emesis, hematemesis, failure to thrive and significant respiratory or systemic findings require evaluation of alternate diagnoses rather than repeated GERD treatment (Brumbaugh et al., 2025; Porto, 2021).

Clinical Reasoning Priorities

A healthy, growing 4-month-old who spits up after feeds and has no alarm findings is not managed like an adult with longstanding nocturnal heartburn and dysphagia. In the infant, the first question is whether reflux is physiologic. In the adult, new dysphagia changes the pathway because a peptic stricture, eosinophilic esophagitis, motility disorder, or malignancy must be considered before simply intensifying acid suppression.

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References

Brumbaugh, D., Furuta, G. T., Hoffenberg, E. J., Kobak, G. E., Kramer, R. E., Nguyen, N., Septer, S., Shull, M., Soden, J., & Walker, T. (2025). Gastrointestinal tract. In M. Bunik, M. J. Levin, M. J. Abzug, & T. L. Schreiner (Eds.), Current diagnosis & treatment: Pediatrics (27th ed., Chapter 21). McGraw Hill.

Jameson, J. L., Fauci, A. S., Kasper, D. L., Hauser, S. L., Longo, D. L., & Loscalzo, J. (Eds.). (2020). Harrison’s manual of medicine (20th ed.). McGraw-Hill Education.

Katz, P. O., Dunbar, K. B., Schnoll-Sussman, F. H., Greer, K. B., Yadlapati, R., & Spechler, S. J. (2022). ACG clinical guideline for the diagnosis and management of gastroesophageal reflux disease. American Journal of Gastroenterology, 117(1), 27–56. https://doi.org/10.14309/ajg.0000000000001538

Mills, J. C., & Ciorba, M. A. (2019). Gastrointestinal disease. In G. D. Hammer & S. J. McPhee (Eds.), Pathophysiology of disease: An introduction to clinical medicine (8th ed., Chapter 13). McGraw-Hill Education.

Norris, T. L. (2020). Porth’s essentials of pathophysiology (5th ed.). Wolters Kluwer.

Porto, A. (2021, November 30). What is the safest sleep solution for my baby with reflux? HealthyChildren.org. https://www.healthychildren.org/English/tips-tools/ask-the-pediatrician/Pages/What-is-the-safest-sleep-solution-for-my-baby-with-reflux.aspx

Rej, A., Chew, T. S., & Sanders, D. S. (2023). Gastroenterology. In I. D. Penman, S. H. Ralston, M. W. J. Strachan, & R. P. Hobson (Eds.), Davidson’s principles and practice of medicine (24th ed., pp. 781–858). Elsevier.