Acid reflux feels like a burning sensation in the middle of your chest, starting behind the breastbone and often radiating upward toward your throat. The intensity ranges from a mild warmth to a sharp, searing pain that can stop you mid-conversation. But burning is only part of the picture. Reflux can also show up as a sour taste in your mouth, a lump in your throat, or a cough that won’t quit.
The Burning Sensation
The hallmark feeling is heat rising through your chest. Your esophagus, the tube connecting your throat to your stomach, runs right through the center of your chest. When stomach acid pushes back up into it, the acid activates pain receptors in the esophageal lining that aren’t designed to handle that level of acidity. Your stomach has a thick protective lining; your esophagus does not. So when acid lands there, those nerve endings fire immediately.
The burn typically starts just below the breastbone and spreads upward. Some people feel it only in a small area behind the sternum. Others feel it climb all the way into the throat, leaving a raw, irritated sensation that lingers. It can be mild enough to ignore or intense enough to make you wonder if something more serious is happening.
The Sour Taste and Fluid in Your Throat
Many people with reflux experience regurgitation, where a mix of stomach acid and partially digested food rises into the back of the throat. You may notice a sour or bitter taste that appears suddenly, especially when bending over or lying down. This is distinct from nausea. It’s not a feeling that you’re about to vomit. It’s more like stomach contents simply creeping upward without warning.
A related symptom called water brash takes this a step further. Your salivary glands flood your mouth with saliva in response to the acid, creating a mix of spit and stomach acid that leaves a distinctly sour taste. It can feel like liquid is stuck in the back of your throat. Water brash is one of the more unpleasant reflux symptoms because it’s hard to ignore and tends to repeat.
Throat Symptoms Without Chest Burning
Not everyone with acid reflux feels the classic chest burn. A form called laryngopharyngeal reflux, sometimes called “silent reflux,” sends acid all the way up to the throat and voice box without triggering obvious heartburn. Instead, you might notice a persistent feeling of something stuck in your throat, constant throat clearing, hoarseness, or a chronic cough that doesn’t respond to cold medicine. These symptoms are easy to misattribute to allergies or a lingering cold, which is why silent reflux often goes undiagnosed for months.
When Symptoms Typically Hit
Reflux rarely strikes on an empty stomach. The burning and regurgitation usually show up after eating, particularly after large or fatty meals. Lying down or bending over shortly after a meal makes it worse because gravity is no longer helping keep stomach contents down. Eating right before bed is a common trigger. Digestion is meant to happen while you’re upright and awake, and when you lie down with a full stomach, acid has an easy path back into the esophagus.
Certain foods and drinks are well-known culprits: coffee, alcohol, citrus, tomato-based sauces, chocolate, and spicy or fried foods. But the timing matters as much as the food itself. The same meal eaten at noon might cause no trouble, while eaten two hours before bed it triggers a miserable night.
What Reflux Feels Like at Night
Nighttime reflux has its own character. You produce less saliva while sleeping, and saliva is one of the body’s natural acid-neutralizing mechanisms. You also swallow less frequently, which means acid that creeps up sits in the esophagus longer. The result can be waking up with a burning throat, a sour taste, or a sudden coughing or choking episode that jolts you out of sleep. Some people wake up gasping, unsure of what just happened.
Nighttime episodes tend to be more damaging to the esophagus because the acid exposure lasts longer. They also disrupt sleep quality in ways that compound over time, leaving you tired during the day even if you don’t fully remember waking up.
How It Differs From a Heart Attack
Reflux and cardiac chest pain can feel alarmingly similar, which is why this question comes up so often. There are patterns that help distinguish them, though no rule is absolute.
- Reflux pain tends to burn. It usually follows a meal, responds to antacids, and worsens when lying down or bending over. It stays centered in the chest and throat area.
- Heart attack pain tends to feel like pressure, squeezing, or tightness rather than burning. It may radiate to the arms, neck, jaw, or back. It often comes with shortness of breath, cold sweats, lightheadedness, or sudden fatigue.
The tricky part is that heart attacks can cause nausea and what feels exactly like indigestion. Both heartburn and heart attack symptoms can come and go. If you have persistent chest pain and aren’t sure what’s causing it, treat it as a cardiac event until proven otherwise. Pain that doesn’t have to last long can still be a warning sign.
When Reflux Changes Over Time
Occasional heartburn after a big meal is common and not necessarily a sign of anything chronic. But when reflux happens twice a week or more, it crosses into gastroesophageal reflux disease, or GERD. The sensations may be the same, but the consequences change. Chronic acid exposure can inflame and damage the esophageal lining over time.
One complication to be aware of is esophageal narrowing. Repeated inflammation causes scar tissue to form, which gradually tightens the esophagus. You might notice food feeling like it’s getting stuck on the way down, or that swallowing becomes effortful in a way it didn’t used to be. Difficulty swallowing is not a normal reflux symptom. It signals that the esophagus has been physically changed by prolonged acid exposure, and it needs medical evaluation.
Reflux that becomes a constant companion, that stops responding to over-the-counter antacids, or that comes with new difficulty swallowing or unexplained weight loss has moved beyond simple heartburn. These changes mean the acid is doing structural damage, and catching that early makes a significant difference in how it’s managed.