Acid reflux causes a burning sensation in the middle of your chest that rises from your lower breastbone toward your throat. This feeling, known as heartburn, is the most recognizable symptom, but reflux can show up in surprisingly different ways, including symptoms that don’t involve your chest at all. Roughly 825 million people worldwide live with gastroesophageal reflux disease (GERD), the chronic form of acid reflux.
Heartburn and Regurgitation
The two hallmark symptoms are heartburn and regurgitation. Heartburn is a painful, burning feeling behind your breastbone that typically worsens after eating and when lying down. It’s not related to your heart, despite the name. The burning happens because stomach acid travels backward into your esophagus, which lacks the protective lining your stomach has.
Regurgitation is the sensation of stomach contents rising back into your throat or mouth. You might taste sour or bitter fluid, or feel like partially digested food has come back up. Some people experience both symptoms together, while others deal mainly with one or the other. Both tend to be worse after large meals, after drinking alcohol, or when you lie down shortly after eating.
Symptoms You Might Not Connect to Reflux
Acid reflux doesn’t always announce itself with a burning chest. It can also cause non-burning chest pain that sits in the middle of the chest and radiates to the back, nausea, difficulty swallowing, or pain while swallowing. These symptoms often overlap with other conditions, which is part of what makes reflux tricky to identify.
The less obvious symptoms are called “atypical” or “extraesophageal” because they show up outside the esophagus. They include:
- Chronic cough that lingers for weeks without a clear respiratory cause
- Hoarseness or a lowered voice, especially in the morning
- Chronic sore throat or frequent throat clearing
- Asthma symptoms that worsen after meals or when lying flat
- Dental erosion from repeated acid exposure in the mouth
What makes these symptoms so easy to misattribute is that the typical reflux clues are often completely absent. When chronic cough is caused by reflux, up to 75 percent of those patients report no heartburn or regurgitation at all. Similarly, 40 to 60 percent of people with reflux-related asthma don’t have classic reflux symptoms. Asthma, postnasal drip, and GERD together account for 94 percent of chronic cough cases, so if a cough won’t quit and other causes have been ruled out, reflux is a strong possibility.
Silent Reflux: When There’s No Heartburn
Laryngopharyngeal reflux, often called “silent reflux,” is a form where acid travels all the way up to the throat and voice box without causing noticeable heartburn. The main symptoms are hoarseness, a persistent feeling of something stuck in your throat (a lump-like sensation), and constant throat clearing. Because it skips the chest burning that most people associate with reflux, it often goes undiagnosed for months or years.
Silent reflux is particularly common among people later diagnosed with Barrett’s esophagus, a condition where the lining of the lower esophagus changes due to long-term acid exposure. About half of people diagnosed with Barrett’s esophagus report little to no reflux symptoms beforehand, which underscores how damaging silent reflux can be over time.
How Symptoms Change at Night
Reflux often worsens at night. Gravity is no longer helping keep stomach contents down when you’re lying flat, and you produce less saliva during sleep, which normally helps neutralize acid in the esophagus. Eating large meals or eating late at night compounds the problem.
Nighttime reflux brings its own set of symptoms beyond heartburn. You might develop an ongoing cough that disrupts sleep, vocal cord inflammation that makes your voice rough in the morning, or new or worsening asthma. Some people wake up with a sour taste in their mouth or a choking sensation. Over time, poor sleep from nighttime reflux creates a cycle of fatigue and worsening symptoms.
Why These Symptoms Happen
At the base of your esophagus sits a ring of muscle that acts as a one-way valve, opening to let food into your stomach and closing to keep acid from traveling upward. In healthy people, this muscle maintains a resting pressure between 10 and 30 mmHg. In people with reflux, this valve relaxes at the wrong times, stays open too long, or doesn’t close tightly enough.
These spontaneous relaxations last more than 10 seconds, compared to the 6 to 8 seconds a normal swallow-triggered opening lasts, and they happen without any swallowing signal. When the stomach is distended (after a big meal, for instance), it stretches the junction between the stomach and esophagus, making these inappropriate relaxations more frequent. The result is acid, and sometimes partially digested food, washing back into the esophagus and potentially reaching the throat, airways, and mouth.
Occasional Reflux vs. GERD
Most people experience acid reflux occasionally, and that’s normal. It becomes GERD when symptoms are frequent enough to affect your daily life or cause damage to the esophagus. A common clinical threshold is heartburn occurring two or more times per week, though the severity and impact of symptoms matter as much as frequency.
Certain symptoms signal that reflux has progressed beyond the occasional nuisance. Difficulty swallowing, particularly the feeling that food gets stuck on the way down, can indicate that chronic acid exposure has narrowed the esophagus through scarring. Persistent pain while swallowing is another signal. These complications develop gradually over years of untreated reflux, which is why paying attention to symptom patterns matters even when individual episodes seem manageable.
Symptoms That Need Prompt Attention
Some symptoms suggest reflux has caused complications or could be mimicking something more serious. Difficulty swallowing that gets progressively worse, unintentional weight loss, non-burning chest pain that radiates to the back, and persistent vomiting all warrant a visit to your doctor sooner rather than later. Chest pain in particular overlaps with cardiac symptoms, and distinguishing between the two based on feel alone isn’t reliable.
Long-standing GERD can lead to esophagitis (inflammation of the esophageal lining), esophageal strictures (narrowing from scar tissue), and Barrett’s esophagus. Barrett’s is notable because it carries a small but real risk of progressing to esophageal cancer, and as mentioned, it frequently develops without obvious symptoms. People who have dealt with frequent heartburn or regurgitation for years are the most likely candidates for these complications, even if their symptoms seem to have improved on their own.