Reflux esophagitis is inflammation and damage to the lining of your esophagus caused by stomach acid repeatedly washing back up from your stomach. It’s the visible injury that chronic acid reflux leaves behind, and it affects a significant portion of the global population. In 2021, over 825 million people worldwide were living with gastroesophageal reflux disease (GERD), the condition that drives this damage. Not everyone with occasional heartburn develops esophagitis, but when reflux happens frequently enough, the acid begins to erode the tissue that lines your swallowing tube.
How Acid Damages the Esophagus
Your stomach is built to handle acid. Your esophagus is not. The lining of the esophagus is made of flat, layered cells held together by tight junctions, almost like tiles sealed with grout. When stomach acid reaches these cells repeatedly, it first attacks and breaks down the junctions between them. This is the earliest stage of damage, happening before you’d even see visible erosion on a scope.
Once those junctions weaken, acid seeps deeper between the cells, triggering inflammation and swelling. Over time, this leads to the red, raw patches and small breaks in the tissue that doctors can see during an endoscopy. Stomach acid isn’t the only culprit. Bile and a digestive enzyme called pepsin can wash up alongside it, compounding the damage. The combination is especially harsh on tissue that has no natural defense against it.
The key factor in all of this is a weak or poorly functioning valve at the bottom of the esophagus. This muscular ring normally opens to let food into the stomach and then closes. When it relaxes at the wrong times or doesn’t close tightly, acidic contents escape upward. Anything that increases pressure on the stomach, such as obesity, pregnancy, or large meals, makes this more likely.
Symptoms Beyond Heartburn
The most recognizable symptom is heartburn: a burning sensation in the chest that typically worsens after eating, at night, or when lying down. But reflux esophagitis can show up in several other ways. Many people experience a sour or bitter taste from acid or partially digested food washing back into the throat. Upper chest or belly pain, difficulty swallowing, and a persistent feeling of a lump in the throat are also common.
Nighttime reflux tends to produce a different set of problems. When acid reaches the throat and airways during sleep, it can trigger a chronic cough, hoarseness or voice changes from inflamed vocal cords, and new or worsening asthma symptoms. These “atypical” symptoms sometimes lead people to see a lung specialist or an ear, nose, and throat doctor before anyone considers reflux as the cause.
How Reflux Esophagitis Is Diagnosed
If your symptoms respond to an initial trial of acid-reducing medication, a formal diagnosis may not require any special testing. But when symptoms persist despite treatment, or when there are warning signs like difficulty swallowing or unintended weight loss, an upper endoscopy is the standard next step. During this procedure, a thin, flexible camera is passed down the throat to directly examine the esophageal lining. Doctors can see the characteristic redness, erosions, or ulcers that define reflux esophagitis and grade its severity.
Biopsies (small tissue samples) taken during an endoscopy serve an important purpose: they help rule out conditions that can look or feel similar to reflux esophagitis. Eosinophilic esophagitis, a condition driven by immune system overreaction rather than acid, causes many of the same symptoms but requires completely different treatment. Biopsies also check for Barrett’s esophagus, a precancerous change in the cell type lining the lower esophagus, and for any other inflammatory or abnormal tissue changes.
Treatment and Healing Timelines
Acid-suppressing medications called proton pump inhibitors (PPIs) are the primary treatment for reflux esophagitis. These drugs dramatically reduce the amount of acid your stomach produces, giving the damaged tissue a chance to heal. In clinical trials, PPIs heal the esophageal lining in roughly 60% to 85% of patients within four weeks, and that number climbs to 75% to 94% by eight weeks. Most people notice symptom improvement well before the tissue fully heals.
A typical course of treatment lasts eight weeks. After that, your doctor may step you down to a lower dose for maintenance or suggest switching to an as-needed approach, depending on how severe the initial damage was. Milder cases sometimes respond to a different class of acid reducers or even over-the-counter antacids, but moderate to severe esophagitis almost always requires PPIs.
For people whose esophagitis doesn’t improve with medication, who can’t tolerate long-term drug therapy, or who develop complications, surgery becomes an option. The most common procedure is called fundoplication, where the top of the stomach is wrapped around the lower esophagus to reinforce the weak valve. Guidelines from the Society of American Gastrointestinal and Endoscopic Surgeons note that failed medical treatment, medication side effects, or GERD complications are all recognized reasons for surgical intervention.
Lifestyle Changes That Help
Medication works best when paired with practical changes to reduce the frequency and severity of reflux episodes. Eating smaller meals and avoiding food for two to three hours before lying down are two of the most effective adjustments. Elevating the head of your bed by placing blocks or a wedge under the mattress (not just stacking pillows, which can bend your body at the waist and worsen pressure) helps keep acid in the stomach overnight.
Certain foods and drinks are well-known triggers, though they vary from person to person. Coffee, alcohol, chocolate, fatty or fried foods, tomato-based sauces, and citrus are frequent offenders. Smoking weakens the lower esophageal valve and should be avoided. Losing weight, even a modest amount, reduces the abdominal pressure that pushes stomach contents upward and can meaningfully reduce reflux frequency.
What Happens if It Goes Untreated
Chronic, untreated reflux esophagitis can lead to several complications. Repeated cycles of damage and healing can produce scar tissue that narrows the esophagus, making swallowing progressively more difficult. Deep erosions can cause bleeding, sometimes slow enough to go unnoticed until anemia develops.
The most closely watched long-term risk is Barrett’s esophagus, where the normal flat cells lining the lower esophagus are replaced by a different cell type better suited to surviving acid exposure. Barrett’s itself doesn’t cause symptoms, but it’s considered a precancerous condition. The actual risk of progressing to esophageal cancer is low: about 0.1% to 0.3% per year for Barrett’s without any abnormal cell changes. That risk increases to around 0.5% per year if early-stage abnormal cells (low-grade dysplasia) are present, and jumps to about 7% per year with more advanced cell changes. These numbers explain why people diagnosed with Barrett’s undergo regular surveillance endoscopies, even when they feel fine.
The reassuring takeaway is that reflux esophagitis is highly treatable, and serious complications are preventable when reflux is controlled. Most people who take medication consistently and make appropriate lifestyle adjustments see their esophageal lining return to normal within two months.