Baekrokdam Care Guide

What is the difference between reflux, gastritis, and functional dyspepsia?

Name: How do reflux, gastritis, and functional dyspepsia differ?
Published: 2026-08-25

Heartburn and the feeling of acid rising into the throat are clues for reflux, and a diagnosis of gastritis is used when inflammation of the gastric mucosa is confirmed via endoscopy. Functional Dyspepsiarefers to cases where epigastric pain, postprandial fullness, or early satiety recur, but no structural disease sufficient to explain these symptoms is identified. Since symptoms can overlap, one should not self-diagnose based on a single comment or a single endoscopy result.

Click on unfamiliar terms to see their meanings immediately.

Reviewed by Korean Medicine Doctor Choi Yeon-seung · Last updated 2026-08-25

Distinguish between acid reflux/heartburn and postprandial fullness

The feeling of stomach contents rising and heartburnif these are central, we examine for reflux; if a lingering feeling of fullness after meals and early satiety (feeling full after eating very little) are central, we examine the patterns of postprandial discomfort in functional dyspepsia. Epigastric burning or pain can overlap in both categories as well as in gastritis.

Interpret endoscopy findings and current symptoms side-by-side

gastritismay refer to mucosal changes confirmed via endoscopy or biopsy, but the severity of the findings does not always correlate with the level of discomfort felt. There can be non-erosive reflux where reflux symptoms exist but no esophageal damage is visible on the endoscopy. You must compare your result sheet with your current symptoms.

Check the condition of the larynx for foreign body sensation in the throat and hoarseness

A feeling of something stuck in the throat, throat clearing, and a hoarse voice can be caused by various factors other than reflux. Laryngopharyngeal Refluxmay be suspected, but since allergies, post-nasal drip, and vocal cord diseases can present similarly, persistent hoarseness or difficulty swallowing may require an evaluation by an otolaryngologist (ENT).

Korean medicine treatment prioritizes overlapping symptoms

When considering Korean herbal medicine treatment, we do not look only at the diagnosis name, but examine whether postprandial fullness, epigastric pain, acid reflux, burping, and nausea are the central symptoms, and how they change in relation to sleep, tension, and bowel movements to determine the direction of the prescription. Treatment for confirmed diseases such as Helicobacter infection or ulcers is continued first.

Check once more before your appointment

Even if they look similar, the order of verification is different

Rather than looking at a single symptom in isolation, observing when it started, what it changed with, and how much it has disrupted your daily life helps in determining the direction of treatment.

Reflux Esophagitis: Details to be checked during evaluation

Non-erosive reflux and reflux hypersensitivity can cause recurring heartburn or chest tightness even if an endoscopy is normal. We design Korean herbal medicine treatments by distinguishing between acid reflux, heat sensations, post-meal stagnation, a foreign body sensation in the throat, tension-induced upward reflux, and cold digestive capacity.

Medications taken, improved symptoms, and remaining symptoms

Gastritis: Details to be confirmed during medical evaluation

After first ruling out causes to be verified such as Helicobacter, medication, or ulcers, if burning in the epigastrium and digestive discomfort persist, we evaluate mucosal heat and dryness, gastric coldness and motility, and tension-induced reflux Byeonjeung (pattern identification)to determine if the intestines are dry, if Qi is blocked, if the pushing force is weak, or if the body is cold and motility is slow.

Endoscopy and Helicobacter results and treatment history

Functional Dyspepsia: Details to be checked during evaluation

Functional dyspepsia is not a state where there is nothing to treat simply because the gastric mucosa is clear. We categorize Korean herbal medicine prescriptions by analyzing the stomach's adaptation to food after meals, emptying rhythm, epigastric sensory hypersensitivity, and the patient's sleep, tension, and body heat through pattern identification.

Meal portion size and the point at which fullness begins

Information that is helpful to write down before your visit

Current medications, improved symptoms, and remaining symptoms
Onset and duration based on after-meal, bedtime, and posture
Early satiety, burping, foreign body sensation in the throat, upper body heat, or coldness
Endoscopy and H. pylori results and treatment history
Fasting and post-meal pain, heartburn, and cold sensations
Food intake, weight, fatigue, anemia, and current medications

Gastrointestinal Glossary

Terms to know in this text

You can proceed to a detailed explanation after confirming the simple meaning.

Gastroesophageal Reflux DiseaseGastroesophageal reflux disease is a condition where stomach contents flow back into the esophagus, causing discomfort such as heartburn and acid regurgitation, or leading to complications.Non-erosive Reflux DiseaseNon-Erosive Reflux Disease is a condition where reflux symptoms are present, but no erosion of the esophageal mucosa is visible on an endoscopy.Laryngopharyngeal RefluxLaryngopharyngeal reflux (LPR) refers to a condition where the reflux of stomach contents is associated with throat and larynx symptoms, which may include a feeling of a lump in the throat, throat clearing, or a hoarse voice.Functional DyspepsiaFunctional dyspepsia is a condition where symptoms such as epigastric pain, postprandial fullness, and early satiety recur, but no structural disease that sufficiently explains these symptoms is identified through tests.Postprandial Distress SyndromePostprandial distress syndrome is a subtype of functional dyspepsia characterized primarily by uncomfortable fullness or early satiety after eating.Epigastric Pain SyndromeEpigastric pain syndrome is a subtype of functional dyspepsia characterized primarily by pain or burning in the epigastric region.Abdominal BloatingAbdominal bloating is a symptom where you feel your abdomen is full or swollen. It can occur with or separately from abdominal distension, where the actual waist circumference increases.DamjeokDamjeok is a description used in Korean medicine to examine digestive discomforts such as bloating, tightness in the solar plexus, and nausea, along with various accompanying symptoms. It does not refer to a single modern medical diagnosis or a single test result.HeartburnHeartburn refers to a burning or searing sensation in the epigastrium or behind the breastbone. While common in reflux diseases, it must be distinguished from epigastric pain or chest pain related to the heart.Acid RefluxAcid regurgitation is the sensation of stomach contents or sour liquid flowing back up through the esophagus into the throat or mouth. This can occur without heartburn.Esophageal HypersensitivityEsophageal hypersensitivity refers to a state where esophageal irritation is strongly perceived as pain or a burning sensation. If acid reflux has decreased but burning or chest pressure remains, Baekrokdam medical evaluations do not simply ask in one sentence if the medicine worked; instead, we examine how the remaining discomfort changes with meals, lying positions, sleep, and tension to determine the next scope of treatment.Functional HeartburnFunctional heartburn is a diagnostic term used when heartburn recurs, but no clear relationship with reflux or esophageal motility disorders is confirmed through tests.Esophageal pH-Impedance TestEsophageal pH and impedance monitoring is a test that records acidic and non-acidic reflux entering the esophagus and the associated symptoms over a certain period. It is used to determine the temporal relationship between reflux and symptoms when no lesions are visible during an endoscopy or when symptoms persist despite medication.Peptic UlcerA peptic ulcer is a condition where deep sores develop on the inner lining of the stomach or duodenum. It can cause epigastric pain, early satiety, and nausea, but in some cases, there are almost no symptoms until it is discovered through bleeding.Post-nasal DripPost-nasal drip is a condition where mucus from the nose and sinuses collects or feels as if it is flowing down the back of the throat. It can cause a feeling of a lump in the throat, throat clearing, and frequent throat clearing, making it easy to confuse with laryngopharyngeal reflux.

Details confirmed in Korean medicine treatment

We review test results and your current discomfort together

Points to be examined during the medical evaluation

Endoscopic findings may differ from symptoms

Even without erosions, reflux events and esophageal sensory hypersensitivity can cause discomfort.

Points to be examined during the medical evaluation

Evaluating endoscopic findings and symptom intensity separately

We distinguish whether there is significant discomfort despite mild gastritis findings, or which symptoms remain after treating the cause.

Points to be examined during the medical evaluation

Fullness and pain are not grouped as a single symptom

Prescriptions differ depending on whether the patient experiences early satiety (feeling full from the first spoonful), prolonged postprandial stagnation, or the onset timing of fasting epigastric burning.

No. Chest pain, cough, hoarseness, or difficulty swallowing may occur. However, since these symptoms can have various causes, we first identify the issues requiring medical evaluation and check for causes other than reflux.

How to discuss my symptoms during the medical evaluation

Discomfort that persists after tests and treatment

How are reflux, gastritis, and functional dyspepsia different?

Heartburn and the feeling of acid rising into the throat are clues for reflux, and a diagnosis of gastritis is used when inflammation of the gastric mucosa is confirmed via endoscopy. Functional dyspepsia refers to cases where solar plexus pain, post-meal fullness, or early satiety recur, but no structural disease is found that sufficiently explains these symptoms. Since symptoms can overlap, do not attempt to self-diagnose based on a single term or a single endoscopy result.

We establish a recovery sequence by dividing the roles of existing treatments and Korean herbal medicine treatment. If there is a cause that requires priority treatment, that treatment will be continued. For Korean herbal medicine treatment, we determine the primary goal and progress criteria by examining the remaining symptoms, their impact on daily life, and the patterns of sleep, digestion, body heat, and fatigue. The sequence of combining this with existing treatments is adjusted based on actual responses, and lifestyle management is tailored to support the treatment goals.

Frequently Asked Questions

Frequently Asked Questions Before Your Visit

If the endoscopy is normal, does that mean it is not reflux?

No. There may be non-erosive reflux where no esophageal damage is visible, and it is also necessary to distinguish between reflux hypersensitivity and other causes.

Is Damjeok the same diagnosis as functional dyspepsia?

They are not the same diagnosis. DamjeokDamjeok is a term used in Korean medicine to describe a combination of various digestive symptoms and systemic patterns. Whether it is functional dyspepsia or gastritis is first distinguished by the progression of symptoms and necessary tests.

Can it be reflux if I only have a cough or hoarseness without heartburn?

It is possible, but cannot be confirmed based on those symptoms alone. We evaluate other potential causes such as rhinitis, asthma, laryngeal diseases, and smoking, along with symptoms occurring after meals or at night.

When should I go to the emergency room for chest pain?

If you experience new oppressive pain, pain radiating to the arms, jaw, or back, shortness of breath, cold sweats, or nausea, seek immediate emergency cardiac evaluation.

Guidance related to my symptoms

Condition GuidanceReflux EsophagitisTypical symptoms of reflux esophagitis include a burning sensation rising from the center of the chest toward the throat and the feeling of sour or bitter gastric contents rising into the throat or mouth. These worsen after meals, when bending over, or after lying down, and may cause awakening at night due to acid reflux or coughing. Chest pain, nausea, chronic cough, or a hoarse voice may appear without heartburn, but these symptoms overlap with cardiac, respiratory, and laryngeal diseases. New oppressive chest pain, shortness of breath, and cold sweats require an immediate emergency cardiac evaluation, while food getting stuck, painful swallowing, hematemesis, melena, persistent vomiting, or weight loss require a prompt gastrointestinal evaluation.Condition GuidanceGastritisMany people have no symptoms even if they have gastritis or gastropathy. If symptoms are present, they may include pain, discomfort, or a burning sensation in the epigastric area (the pit of the stomach), nausea or vomiting, early satiety (feeling full after only a few spoonfuls), postprandial fullness, and loss of appetite or weight. Gastritis is inflammation of the mucosa, while a peptic ulcer is a deeper wound in the stomach or duodenum, so they are not the same. Since the degree of inflammation seen on an endoscopy does not always correlate with the level of discomfort felt, not all upper abdominal symptoms are explained by gastritis alone. If you vomit blood or coffee-colored material, have black stools, or experience dizziness or shortness of breath, bleeding must be evaluated first. If sudden upper abdominal discomfort is accompanied by chest pain, cold sweats, shortness of breath, or pain radiating to the jaw, neck, or arms, heart issues must be evaluated first.Condition GuidanceFunctional DyspepsiaThe core of functional dyspepsia includes postprandial fullness (feeling full for a long time even after eating a small amount), early satiation (difficulty finishing a normal meal), and pain or burning localized in the epigastric area. It is divided into Postprandial Distress Syndrome (PDS), centered on postprandial fullness and early satiation, and Epigastric Pain Syndrome (EPS), centered on epigastric pain and burning, though these two patterns can overlap. Bloating, nausea, and belching may also occur; if heartburn or reflux behind the sternum is the primary symptom, GERD is examined separately. Conditions that cause similar symptoms, such as gastroparesis or peptic ulcers, are first distinguished through necessary tests. Do not dismiss hematemesis (vomiting blood), melena (black stools), difficulty swallowing, frequent or persistent vomiting, unintentional weight loss, jaundice, or persistent severe pain as functional. If chest pain spreads to the jaw, neck, or arms, or if you experience shortness of breath, an emergency cardiac evaluation is the priority.Condition GuidanceNon-Erosive Reflux Disease (NERD)Non-erosive reflux disease (NERD) is a pattern where typical reflux symptoms are present, but no esophageal erosion is visible on an endoscopy. The fact that an endoscopy is normal does not mean the symptoms are fake, but not all heartburn is caused by reflux. If the response to medication is insufficient, the dosage and diagnosis are reviewed, and if necessary, pH or impedance tests are performed to distinguish other causes such as esophageal hypersensitivity or functional heartburn.Digestive Health ColumnReflux esophagitis, non-erosive reflux, and reflux laryngitis: how are they distinguished?Reflux esophagitis is a condition where mucosal damage is visible on an endoscopy; non-erosive reflux disease is a condition with reflux symptoms but no visible damage; and reflux laryngitis is a condition centered on throat and larynx symptoms.Digestive Health ColumnWhat is the difference between PDS, where you feel full after eating very little, and EPS, where the epigastric area hurts?Within functional dyspepsia, Postprandial Distress Syndrome (PDS), characterized by feeling full after eating only a small amount, and Epigastric Pain Syndrome (EPS), centered on pain and burning in the epigastric region (the pit of the stomach), differ in how the stomach is affected. By distinguishing between these two types, the focus of Korean herbal medicine treatment, whether it be tonifying, reducing stagnation, clearing heat, or regulating qi, becomes clearer.

Evidence and Update Information

The following materials were referenced for definitions, criteria for distinguishing similar symptoms, and safety standards. These are applied together with medical interviews and pattern identification (Byeonjeung) to determine the direction of Korean herbal medicine and acupuncture treatments and the sequence for integrating them with existing treatments.