Esophageal dilation is needed when your esophagus has narrowed enough to make swallowing difficult or painful. A healthy esophagus measures about 30 mm across, but scarring, inflammation, or abnormal tissue growth can shrink that opening to 13 mm or less, the point where food starts getting stuck. The procedure stretches the narrowed area back open, and the specific reason you’d need it depends on what caused the narrowing in the first place.
Strictures From Chronic Acid Reflux
The single most common reason for esophageal dilation is a peptic stricture, which accounts for 70 to 80% of all esophageal strictures in adults. This happens when long-standing acid reflux repeatedly damages the lining of the esophagus. Over months or years, the tissue responds by forming scar tissue that thickens and tightens the esophageal wall, gradually narrowing the passageway.
A hiatal hernia significantly raises the risk. About 85% of people who develop a reflux-related stricture also have a hiatal hernia, which allows stomach acid to wash upward more easily. If you’ve had persistent heartburn for years and start noticing that solid foods feel like they’re catching in your chest, that progression from reflux to stricture is likely what’s happening. Dilation reopens the passage, typically to a target diameter of at least 14 mm, though multiple sessions spaced about two weeks apart are sometimes needed for tighter strictures.
Schatzki Rings and Esophageal Webs
A Schatzki ring is a thin band of tissue that forms right where the esophagus meets the stomach. It’s the most common type of esophageal ring found during imaging or endoscopy. Rings narrow enough to cause symptoms (13 mm or less) show up in roughly 0.5% of imaging studies, but even a slightly wider ring can cause trouble if you swallow a large, poorly chewed piece of food.
This is sometimes called “steakhouse syndrome” or “backyard barbeque syndrome” because it often announces itself dramatically: a chunk of meat gets lodged at the ring and won’t go up or down. That food impaction is the most common way people discover they have a Schatzki ring, aside from general difficulty swallowing. Dilation for these rings typically uses a larger dilator (15 mm or bigger) to break through the band of tissue and restore a comfortable opening.
Eosinophilic Esophagitis
Eosinophilic esophagitis (EoE) is a chronic immune condition where a specific type of white blood cell builds up in the esophageal lining, causing inflammation and, over time, scarring and narrowing. People with EoE often modify what they eat or how they eat to avoid food getting stuck, sometimes without realizing they’ve been compensating for years.
Dilation for EoE follows a “start low and go slow” approach, meaning the doctor begins with a smaller dilator and works up gradually, often over multiple sessions, until the esophagus reaches roughly 16 mm. Mucosal tears during dilation are common in EoE and usually expected as part of the process, but true perforation is rare. In a review of 671 dilations in EoE patients, only one perforation occurred, a rate of 0.1%.
One important distinction: dilation treats the narrowing but not the underlying inflammation. Current guidelines from the American College of Gastroenterology recommend pairing dilation with anti-inflammatory treatment (medication or dietary elimination) because dilation alone won’t prevent the disease from causing new damage. Patients who achieve control of the inflammation need fewer repeat dilations over time.
Achalasia
Achalasia is a nerve disorder where the muscles of the esophagus stop contracting normally and the valve at the bottom won’t relax properly. Food and liquid pool in the esophagus instead of passing into the stomach, causing difficulty swallowing, chest pain, and regurgitation of undigested food.
For achalasia, dilation works differently. A balloon is inflated at the tight lower valve to stretch it open. This pneumatic dilation has been a primary treatment for decades, with success rates around 86% at two years. A European trial published in the New England Journal of Medicine compared balloon dilation to surgical treatment and found no significant difference in outcomes after two years, with surgery succeeding 90% of the time versus 86% for dilation. Some people need repeat dilation sessions, but many get lasting relief.
Radiation and Cancer-Related Narrowing
Radiation therapy to the head, neck, or chest can scar the esophagus and produce strictures that develop weeks to months after treatment ends. These strictures tend to be stubborn. In one study of radiation-induced strictures, patients needed an average of 3.3 dilation sessions over about four weeks to achieve an adequate opening, and 33% experienced a recurrence at a median of 22 weeks. Cancerous tumors in or near the esophagus can also cause narrowing, sometimes requiring dilation to maintain the ability to eat during treatment.
What the Procedure Involves
Two main techniques are used. Bougie dilation involves passing progressively thicker flexible tubes through the narrowed area, applying pressure along the length of the stricture. Balloon dilation places a deflated balloon at the exact point of narrowing and inflates it, applying outward pressure in all directions. The balloon approach lets the doctor watch the dilation happen in real time through the endoscope, while bougie dilation relies more on the doctor’s feel of resistance against the dilator.
Despite the theoretical advantages of balloon dilation (better precision, potentially less trauma), no high-quality studies have shown one method to be clearly superior. Doctors choose based on the type of narrowing and personal experience. Bougie dilation may cause slightly more throat soreness afterward because the dilator passes through the throat on its way down, while a balloon is positioned and inflated entirely in the lower esophagus.
Recovery and What to Expect Afterward
Most people return to normal activities the day after dilation. Your doctor may recommend sticking to soft foods like yogurt, mashed potatoes, or pudding for the first day or so while any minor irritation settles. Mild throat soreness is normal.
Serious complications are uncommon. Across all types of strictures, the rate of major complications (primarily perforation) is estimated at about 0.5% of all dilation procedures. For many people, a single session provides significant relief. Others, particularly those with refractory strictures, EoE, or radiation damage, may need periodic repeat sessions. A stricture is considered recurrent if the esophagus narrows again within four weeks of reaching an adequate diameter, and refractory if five sessions over ten weeks can’t achieve a wide enough opening.
Symptoms That Typically Lead to Dilation
The hallmark symptom is dysphagia: the feeling that food is stuck in your throat, chest, or behind your breastbone after you swallow. You might notice it first with solid foods like bread or meat, then gradually with softer foods as the narrowing worsens. Some people unconsciously adapt by eating more slowly, chewing excessively, drinking water with every bite, or avoiding certain textures altogether.
Other signs that a narrowing may be developing include unintentional weight loss, regurgitation of unswallowed food, and repeated episodes of food getting lodged. If food becomes completely stuck and you can’t swallow at all, that’s an emergency requiring immediate care. Most of the time, though, dilation is a planned procedure done after an endoscopy confirms the narrowing and identifies its cause.