The two hallmark signs of acid reflux are heartburn, a burning sensation that rises from below your breastbone toward your throat, and regurgitation, where stomach contents come back up into your throat or mouth leaving a sour or acidic taste. If you experience one or both of these regularly, especially after meals or when lying down, you likely have acid reflux. Everyone gets occasional reflux, but when it becomes a persistent pattern, it crosses into gastroesophageal reflux disease (GERD).
The Classic Symptoms
Heartburn is the symptom most people recognize. It’s a burning pain in the center of your chest, behind the breastbone, that tends to worsen after eating, when bending over, or when lying flat. It’s often relieved by antacids, which is itself a useful clue. If you pop an antacid and the pain fades, that points strongly toward acid as the cause.
Regurgitation feels different. Rather than pain, it’s the sensation of food or liquid moving backward into your throat or mouth. You may notice a sour or bitter taste without any nausea or vomiting. Some people describe it as a “wet burp.” Both heartburn and regurgitation tend to be worse after large meals, fatty or spicy foods, alcohol, chocolate, carbonated drinks, or caffeinated beverages. These foods relax the muscular valve between your esophagus and stomach, making it easier for acid to escape upward.
Less Obvious Signs You Might Miss
Not everyone with acid reflux gets heartburn. GERD can also cause chest pain, nausea, difficulty swallowing, or pain when swallowing. Some people develop a chronic cough, a hoarse voice, or frequent throat clearing that they never connect to their stomach. This pattern is sometimes called “silent reflux” or laryngopharyngeal reflux (LPR), because acid reaches the throat and voice box without causing the typical burning chest sensation.
The most common silent reflux symptoms are a persistent cough (especially after eating or lying down), hoarseness, and a feeling of a lump stuck in your throat. If you’ve had an unexplained cough or scratchy voice for weeks and your doctor can’t find a respiratory cause, reflux is worth considering.
Nighttime Reflux and Sleep Problems
Roughly 70 to 75 percent of people with GERD symptoms report nighttime heartburn, and about 40 percent of those say it disrupts their sleep. Lying flat removes gravity’s help in keeping acid down, so symptoms often intensify at night. You might wake up coughing, choking, or with a sour taste in your mouth.
Some people don’t notice classic heartburn at night but still have reflux disturbing their sleep. They wake frequently without knowing why, and their main complaint is poor sleep quality or daytime fatigue rather than chest burning. If you consistently sleep poorly and also have any daytime reflux symptoms, the two may be connected.
A Simple Way to Self-Screen
Doctors sometimes use a six-question screening tool called the GerdQ to help identify GERD. You don’t need the formal questionnaire to borrow its logic. It evaluates four things that point toward reflux (heartburn, regurgitation, sleep disruption from symptoms, and needing over-the-counter antacids) and two things whose absence supports the diagnosis (upper abdominal pain centered above the belly button and nausea). In other words, if you have heartburn and regurgitation but not much nausea or stomach pain, reflux is a strong possibility. If nausea and upper abdominal pain are your main complaints, something else may be going on.
Reflux Pain vs. Heart Attack Pain
Chest pain from acid reflux can feel alarming, and it’s reasonable to wonder whether it could be your heart. There are key differences. Heartburn typically burns, occurs after eating or lying down, and improves with antacids. Heart attack pain is more often described as pressure, tightness, or squeezing that may spread to your neck, jaw, or arm. A heart attack may also bring shortness of breath, cold sweats, lightheadedness, or sudden fatigue.
The overlap is real, though. Heart attacks can cause nausea and what feels like indigestion, and esophageal muscle spasms can mimic cardiac pain closely. If your chest pain is new, severe, accompanied by shortness of breath or sweating, or feels like pressure radiating outward, treat it as a potential cardiac event and get emergency help.
When Patterns Point to Something More
Occasional reflux after a big meal is normal. The shift from “normal” to “disease” happens when symptoms recur frequently, typically multiple times per week, and begin affecting your quality of life. Pay attention to how often you reach for antacids, whether symptoms are changing what you eat or how you sleep, and whether the pattern has persisted for weeks or months rather than days.
Certain symptoms require prompt medical attention. Difficulty swallowing, painful swallowing, unexplained weight loss, signs of bleeding (like vomiting blood or dark stools), and anemia are all red flags. These don’t necessarily mean something serious, but they warrant investigation to rule out complications like esophageal narrowing or other conditions.
What Happens if Reflux Continues Long-Term
Left untreated, chronic acid exposure can damage the lining of the esophagus. About 10 percent of people with ongoing erosive inflammation develop esophageal strictures, where scar tissue narrows the esophagus and makes swallowing progressively harder. This is more common in older adults.
Between 7 and 12 percent of people with chronic GERD develop Barrett’s esophagus, a condition where the cells lining the lower esophagus change in response to repeated acid injury. The risk increases with time: people who have had reflux symptoms for less than a year have about a 3 percent prevalence, but that rises above 20 percent in people who’ve had symptoms for over 10 years. Barrett’s esophagus matters because it’s associated with a higher risk of esophageal cancer, though the progression is slow and can be monitored.
How Doctors Confirm the Diagnosis
Most of the time, a doctor will diagnose GERD based on your symptom description and your response to treatment. If symptoms don’t improve, or if red flags are present, two tests provide more definitive answers.
An upper endoscopy involves a thin, flexible tube with a camera passed through your mouth to visually inspect your esophagus, stomach, and upper intestine. The doctor can see inflammation, ulcers, narrowing, or changes in the tissue, and can take small biopsies if needed. This test checks for complications and rules out other causes of your symptoms.
Esophageal pH monitoring is the most accurate way to measure acid in the esophagus. A thin catheter placed through the nose, or a small wireless capsule attached to the esophageal lining, records acid levels over 24 to 48 hours while you go about your day. You track your meals, sleep, and symptoms during the monitoring period so the doctor can match acid spikes to what you were feeling. This test is particularly useful when the diagnosis is uncertain or when treatment isn’t working as expected.
Tracking Your Own Triggers
Before you see a doctor, keeping a simple log for one to two weeks can be remarkably useful. Note what you eat, when symptoms appear, how long they last, and what makes them better or worse. Common triggers include fatty foods, chocolate, mint, citrus, tomatoes, onions, garlic, coffee, alcohol, and carbonated drinks. These all reduce pressure in the valve at the top of your stomach, making reflux more likely. Eating within two hours of lying down and large portion sizes are also reliable triggers for many people. A pattern in your log gives both you and your doctor a clearer starting point.