GERD is diagnosed when acid reflux causes symptoms two or more times a week, or when stomach acid has started damaging the tissue lining your esophagus. Everyone gets heartburn occasionally, but that frequency threshold is the key dividing line between normal reflux and a chronic condition that needs treatment. If you’re reaching for antacids more than twice a week, what you’re dealing with is likely GERD.
The Two Classic Symptoms
Heartburn is the hallmark of GERD: a burning sensation in the center of your chest that radiates upward toward your throat. It often comes with a sour or bitter taste in the back of your mouth. The second classic symptom is regurgitation, where you feel stomach contents rising into your throat or mouth without vomiting. These two symptoms together are typically enough for a doctor to suspect GERD without running any tests.
Both tend to get worse after eating and when you lie down. If you notice that a large meal reliably triggers a burning chest and sour taste, especially once you recline on the couch or go to bed, that pattern is one of the strongest indicators of GERD.
Symptoms You Might Not Connect to Reflux
GERD doesn’t always announce itself with obvious heartburn. Acid can travel beyond the esophagus and irritate your throat, airway, and lungs, producing symptoms that seem completely unrelated to digestion.
- Chronic cough: A dry, persistent cough lasting more than eight weeks, typically worse during the day while you’re upright. Unlike a cold or allergy cough, it doesn’t produce mucus.
- Hoarseness and voice fatigue: Acid irritating the vocal cords can make your voice raspy, especially in the morning. You may also feel the need to constantly clear your throat.
- Globus sensation: A persistent feeling of a lump in your throat, even when nothing is there.
- Throat pain: Soreness that doesn’t match a typical infection and doesn’t respond to antibiotics.
- Asthma-like symptoms: Acid reaching the airway can trigger wheezing and shortness of breath, and GERD can worsen existing asthma.
This is sometimes called “silent reflux” because you can have significant acid exposure without ever feeling traditional heartburn. If you’ve been treated for a chronic cough or throat problem that won’t resolve, undiagnosed GERD is a common culprit.
What Happens at Night
Nighttime reflux is particularly telling. Your body’s natural defenses against acid, like swallowing and saliva production, essentially shut down while you sleep. Saliva is mildly alkaline and helps neutralize acid in the esophagus, but its production ceases during sleep. Swallowing, which pushes acid back down, only happens during brief awakenings. The result is that when acid does reflux at night, it sits in your esophagus much longer and causes more damage.
If you regularly wake up with a sour taste, a burning throat, or a cough, those are strong signals. Nighttime reflux also disrupts sleep quality in ways you might not attribute to GERD. About 25% of people in one large study of over 15,000 participants reported reflux symptoms, and those with nighttime heartburn had significantly worse daytime performance and higher rates of insomnia. Waking up tired despite enough hours of sleep, combined with any reflux symptoms, is worth paying attention to.
Clues From Your Dentist
One surprising way GERD reveals itself is through your teeth. Chronic acid exposure erodes tooth enamel in a distinctive pattern. The damage typically starts on the inner surfaces of your upper front teeth, because that’s where refluxed acid contacts first. The affected surfaces look smooth, shiny, and slightly concave, as if the enamel has been gently scooped away. Over time, the erosion spreads to the chewing surfaces of the back teeth.
Your lower teeth are often spared early on because your tongue shields them. If your dentist has pointed out unusual enamel erosion, increased tooth sensitivity, or a loss of tooth structure that doesn’t match your diet, GERD may be the underlying cause. Burning mouth syndrome is another oral symptom linked to chronic reflux.
How Doctors Confirm It
In most cases, doctors diagnose GERD based on your symptoms and history alone. If you describe heartburn and regurgitation happening twice a week or more, without any warning signs of something more serious, the standard approach is to skip testing and go straight to an eight-week trial of a proton pump inhibitor (a common acid-reducing medication) taken once daily before a meal. If your symptoms improve, that response itself helps confirm the diagnosis.
After those eight weeks, doctors generally recommend trying to stop the medication to see if symptoms return. This helps distinguish GERD from a temporary flare-up.
Testing becomes necessary when symptoms don’t respond to treatment, when there’s concern about complications, or when another condition might be mimicking GERD. The two main tests are:
- Upper endoscopy: A thin, flexible camera is passed through your mouth to visually inspect the esophagus for inflammation, narrowing, or tissue changes.
- Esophageal pH monitoring: The most accurate way to measure acid exposure. A small sensor, either on a thin tube passed through the nose or a tiny wireless capsule placed in the esophagus, records acid levels over 24 to 48 hours.
Chest Pain and What Else It Could Be
GERD-related chest pain can feel identical to heart-related chest pain. Recurrent chest pain that isn’t caused by a heart problem is common, and GERD is one of the most frequent explanations. But you should never assume chest pain is reflux without first ruling out cardiac causes, especially if the pain is new, severe, or accompanied by shortness of breath, arm pain, or lightheadedness.
Other conditions that can mimic GERD include functional dyspepsia (chronic upper stomach discomfort without a clear structural cause) and eosinophilic esophagitis (an allergic inflammatory condition of the esophagus that causes difficulty swallowing). This is one reason doctors sometimes order an endoscopy: not just to confirm GERD, but to rule out conditions that look similar.
Alarm Symptoms That Need Prompt Evaluation
Most GERD is manageable and not dangerous, but certain symptoms signal that something more serious may be happening. These include difficulty swallowing or pain when swallowing, unexplained weight loss, vomiting blood, and black or bloody stools. Any of these warrants an endoscopy rather than a wait-and-see approach with medication.
Long-standing GERD also raises the risk of a condition called Barrett’s esophagus, where chronic acid exposure changes the cells lining the lower esophagus. Current guidelines recommend screening with an endoscopy for people who have had GERD symptoms for five or more years and have additional risk factors: being over 50, male, white, a current or former smoker, or obese. A family history of Barrett’s esophagus or esophageal cancer also increases the importance of screening. Most guidelines suggest screening when three or more of these risk factors are present alongside chronic symptoms.