Acid reflux causes a burning sensation in the middle of your chest, rising from behind your breastbone toward your throat. This feeling, called heartburn, is the most recognizable symptom, but reflux can also show up as a chronic cough, sore throat, or trouble swallowing, sometimes without any chest burning at all.
The Two Core Symptoms
Heartburn and regurgitation are the hallmark signs. Heartburn is a painful burning that starts at the lower tip of your breastbone and moves upward toward your throat. It often worsens after eating, when bending over, or when lying down. Regurgitation is the sensation of stomach contents traveling back up into your throat or mouth. You may taste something sour or bitter, or feel like partially digested food has come back up.
Most people experience occasional reflux, and that’s normal. When these episodes happen more than twice a week or start interfering with your daily life, it crosses the line into gastroesophageal reflux disease (GERD), a chronic condition that can damage the lining of the esophagus over time.
Symptoms You Might Not Expect
Acid reflux doesn’t always announce itself with heartburn. Some people develop what’s called laryngopharyngeal reflux, or “silent reflux,” where acid travels all the way up to the throat and voice box without causing the classic chest burn. This can be tricky to identify because the symptoms mimic other conditions entirely.
Silent reflux symptoms include:
- Hoarseness or a noticeably lower voice
- Chronic cough that doesn’t respond to typical treatments
- A lump-like feeling in your throat, as if something is stuck
- Frequent throat clearing or excess mucus
- Chronic sore throat or recurring laryngitis
- Wheezing or new/worsening asthma symptoms
- Postnasal drip that doesn’t seem tied to allergies or a cold
If you’ve been chasing a cough or sore throat for weeks without finding an explanation, reflux is worth considering as the cause. Many people go through rounds of allergy treatments or antibiotics before reflux is identified.
Why Nighttime Symptoms Feel Worse
Nighttime heartburn affects up to 25% of the general population and has been reported in over 70% of people with frequent reflux. It tends to feel more intense than daytime episodes, and that’s not just perception. Your body’s defenses against acid are significantly weaker during sleep.
When you’re lying flat, gravity can no longer help keep stomach contents down. At the same time, your swallowing rate drops, saliva production decreases, and the wave-like muscle contractions that normally push acid back down into your stomach slow considerably. Your stomach also empties more slowly during sleep while producing more acid. The result is that acid sits in your esophagus longer and causes more irritation.
Nocturnal reflux disrupts sleep in ways that compound over time. The most common complaints are difficulty falling asleep, trouble staying asleep, and feeling tired or worn out the next day. Some arousals from reflux are so brief you don’t remember waking up, but they fragment your sleep pattern enough to leave you feeling unrested and sluggish during the day.
What Causes These Symptoms
At the bottom of your esophagus, a ring of muscle acts as a valve, opening to let food into your stomach and closing to keep acid from traveling back up. When this valve weakens or relaxes at the wrong time, stomach acid escapes into the esophagus. The esophageal lining isn’t built to handle acid the way your stomach is, so even brief exposure causes the burning, irritation, and inflammation that produce symptoms.
Certain foods make this worse by relaxing that valve or slowing digestion so food sits in the stomach longer. The most common culprits are high-fat, salty, or spicy foods: fried foods, fast food, fatty meats like bacon and sausage, pizza, and cheese. Tomato-based sauces, citrus fruits, chocolate, peppermint, and carbonated drinks can also trigger episodes. These aren’t universal triggers for everyone, but they’re a reliable starting list if you’re trying to figure out what’s setting off your symptoms.
Symptoms That Need Prompt Attention
Most acid reflux is uncomfortable but manageable. A few symptoms, however, signal something more serious. Difficulty swallowing that happens regularly, especially if food feels stuck in your chest or throat, needs medical evaluation. The same is true for unexplained weight loss alongside reflux symptoms, or for vomiting that accompanies trouble swallowing. If a blockage ever makes it hard to breathe, that’s an emergency.
Pain while swallowing, as opposed to simple discomfort from heartburn, can indicate that the esophageal lining has been damaged. Persistent nausea or chest pain that doesn’t clearly follow the pattern of heartburn also warrants a closer look, partly because chest pain from reflux can mimic heart-related pain.
What Happens If Reflux Continues Untreated
Chronic, unmanaged reflux can gradually change the tissue lining the lower esophagus. Over years of repeated acid exposure, the normal flat, pink cells can be replaced by thicker, reddish tissue in a condition called Barrett’s esophagus. Barrett’s doesn’t cause distinct symptoms of its own, so people typically don’t know they have it unless they’re screened. The concern is that Barrett’s esophagus carries an increased risk of developing esophageal cancer, though this progression is uncommon.
Before reaching that stage, chronic reflux can cause esophagitis, which is visible inflammation and erosion of the esophageal lining. This is what drives more severe pain while swallowing and can lead to narrowing of the esophagus, making it progressively harder to eat normally.
How Acid Reflux Is Diagnosed
For most people, a doctor can diagnose reflux based on symptoms alone, particularly if heartburn and regurgitation respond to acid-reducing medication. When the picture is less clear, or symptoms don’t improve with treatment, a test called 24-hour pH impedance monitoring can measure how much acid is actually reaching your esophagus over the course of a full day. A thin tube placed through the nose records acid levels and matches them to the exact moments you feel symptoms, giving a detailed picture of what’s happening and when. This is one of the most reliable ways to confirm reflux, especially when silent reflux is suspected and heartburn isn’t the main complaint.