Heartburn is a burning pain in the chest, felt just behind the breastbone, that typically flares after eating. It affects a large portion of adults at some point, and while the classic burning sensation is the hallmark, heartburn can show up in ways you might not expect, from a chronic cough to a sore throat that won’t quit. Here’s what to look for and how to tell heartburn apart from something more serious.
The Classic Symptoms
The signature feeling is a burning sensation that starts in the upper abdomen and rises into the chest. It usually kicks in after a meal and can last anywhere from a few minutes to a couple of hours. You may also notice a bitter or sour taste in your mouth, especially when lying down, as small amounts of stomach acid creep up into the back of your throat.
Pain that gets worse when you bend over or lie flat is another telltale sign. Antacids typically bring relief within minutes, which is one of the simplest ways to confirm that what you’re feeling is heartburn rather than something else. Some people also experience regurgitation, where partially digested food or acid moves back up into the throat. This is different from vomiting; it happens passively, often with just a positional change.
Nighttime Heartburn
Heartburn that wakes you up at night is especially common if you’ve eaten within two hours of going to bed. During sleep, your body naturally produces less saliva, swallows less frequently, and reduces the wave-like muscle contractions that normally push acid back down into the stomach. All of that means acid sits in the esophagus longer than it would during the day.
Sleeping flat makes gravity work against you. Elevating the head of your bed or sleeping on your left side can help, as can leaving at least three to four hours between your last meal and bedtime. Nighttime episodes tend to feel more intense and can disrupt sleep quality even when they don’t fully wake you.
Symptoms You Might Not Recognize as Heartburn
Heartburn doesn’t always announce itself with chest burning. Acid that travels beyond the esophagus can irritate the throat, voice box, and airways, producing symptoms that seem completely unrelated to digestion. These atypical presentations include chronic cough, hoarseness, a persistent sore throat, and a sensation of a lump in the throat (sometimes called globus). Acid reflux accounts for up to 60 percent of chronic laryngitis cases and roughly a quarter to half of people who feel a persistent lump in their throat.
Perhaps the most surprising part: when reflux is the primary cause of a chronic cough, there are no identifiable digestive symptoms in up to 75 percent of cases. That means you can have acid-related coughing without ever feeling the classic burn. Dental erosion is another overlooked sign. Repeated acid exposure can gradually wear away tooth enamel, particularly on the back surfaces of the upper teeth.
Water Brash
A less well-known symptom is water brash, a sudden flood of saliva mixed with stomach acid that leaves a sour taste in your mouth. Your salivary glands essentially go into overdrive in response to rising acid. Some people produce up to two teaspoons of saliva per minute during an episode. Water brash is different from regurgitation. With regurgitation, stomach contents come back up. With water brash, the main issue is the excess saliva your body generates in reaction to the acid.
Heartburn During Pregnancy
Pregnancy makes heartburn significantly more likely, and symptoms can start as early as 12 weeks. Three things work together to cause it: hormonal changes relax the muscular valve between the stomach and esophagus, the growing baby presses upward on the stomach, and digestion generally slows down. The result is a burning sensation in the chest, feeling uncomfortably full or bloated, burping, and sometimes bringing food back up.
Symptoms often come on soon after eating or drinking but can sometimes show up with a delay. They tend to worsen as the pregnancy progresses and the baby takes up more abdominal space. Eating smaller meals, staying upright after eating, and avoiding spicy or fatty foods can reduce the frequency of episodes.
Heartburn vs. Heart Attack
Chest pain always deserves a moment of careful thought because heartburn and heart attacks can feel similar at first. The differences, however, are fairly distinct once you know what to look for.
Heartburn typically produces a burning sensation that’s tied to meals or body position and improves with antacids. A heart attack, on the other hand, feels more like pressure, tightness, or squeezing in the chest or arms, and that sensation often radiates to the neck, jaw, or back. Heart attacks also come with symptoms heartburn doesn’t: shortness of breath, cold sweat, sudden dizziness, and unusual fatigue. Nausea can occur with both, which adds to the confusion, but the presence of sweating, lightheadedness, or spreading pain points toward a cardiac event.
If there’s any doubt, treat it as a heart attack until proven otherwise. The cost of being wrong about heartburn is a trip to the emergency room. The cost of being wrong about a heart attack is far higher.
Warning Signs That Need Attention
Occasional heartburn is normal. But certain symptoms suggest that acid has been causing damage over time and that something more than lifestyle changes may be needed:
- Difficulty swallowing or a feeling that food is getting stuck behind the chest, which can indicate narrowing of the esophagus from chronic acid exposure.
- Vomiting blood, whether it looks like red clots or dark coffee grounds, or having black, tarry stools, both of which signal bleeding in the digestive tract.
- Unintended weight loss combined with difficulty tolerating food.
- Chronic hoarseness or choking episodes caused by acid reaching the windpipe, sometimes triggering coughing or shortness of breath.
- Heartburn that doesn’t respond to medication, which may point to a condition beyond simple acid reflux.
Any of these warrants a conversation with a doctor. The typical next step is an upper endoscopy, a procedure where a thin camera is passed down the throat to look directly at the esophagus and stomach lining for signs of inflammation, narrowing, or other damage.