A cricopharyngeal bar is a shelf-like protrusion of muscle at the top of your esophagus that fails to open fully when you swallow. It shows up on imaging as a horizontal indentation pressing into the back of the throat, right at the level of the cricoid cartilage (the ring of cartilage just below your Adam’s apple). About 25% of people who undergo a swallowing study have some degree of this finding, and many of them have no symptoms at all.
The Muscle Behind the Bar
The cricopharyngeus muscle wraps around the top of your esophagus like a drawstring, forming the upper esophageal sphincter. Its job is to stay closed most of the time, preventing air from entering your digestive tract and food from coming back up into your throat. Every time you swallow, it relaxes and opens briefly to let food pass through, then snaps shut again.
In people with a cricopharyngeal bar, the muscle doesn’t stretch open the way it should during a swallow. Studies using simultaneous video X-rays and pressure measurements show that the sphincter reaches a smaller maximum opening than normal, which forces the food or liquid above it into a tighter space. That creates higher pressure upstream of the muscle. The underlying problem isn’t that the muscle is squeezing too hard. It’s that the muscle tissue has become stiffer and less elastic, so even when it receives the signal to relax, it doesn’t expand enough. This reduced compliance is why the condition is sometimes called cricopharyngeal achalasia, meaning the muscle fails to loosen properly.
What It Feels Like
Many people with a cricopharyngeal bar notice nothing wrong. When symptoms do develop, the most common complaint is difficulty swallowing, particularly with solid foods that require the sphincter to open wide. You might feel like food is getting stuck low in your throat or just won’t go down smoothly.
Some people experience a persistent sensation of a lump in the throat, pressure just below the Adam’s apple, or a feeling that something is lodged there and won’t clear. Choking or strangling sensations can occur, especially with larger bites. Interestingly, these symptoms often ease or disappear while actively eating or drinking, since swallowing triggers the muscle to relax at least partially.
How It’s Diagnosed
The standard test is a videofluoroscopic swallow study, sometimes called a modified barium swallow. You drink a liquid containing barium while a radiologist watches your swallow in real time on an X-ray screen. The classic finding is a horizontal bar-shaped indentation pressing into the barium column from behind, at the level of the cricoid cartilage. This indentation persists throughout the swallow rather than opening up as it should.
High-resolution manometry, a test that measures pressure along the esophagus using a thin catheter, can confirm the diagnosis by showing elevated pressure just above the sphincter during swallows. This raised pressure reflects the bottleneck created by the stiff muscle. Manometry is especially useful when the swallow study findings are subtle or when doctors want to rule out other motility problems before planning treatment.
Connection to Zenker’s Diverticulum
A cricopharyngeal bar that goes untreated over years can contribute to a more serious structural problem. Just above the cricopharyngeus muscle sits a naturally weak spot in the throat wall called Killian’s dehiscence. When the bar repeatedly forces swallowed material against this area at high pressure, the inner lining of the throat can gradually balloon outward through the weak spot, forming a pouch called a Zenker’s diverticulum. This pouch traps food and liquid, causing bad breath, regurgitation of undigested food (sometimes hours after eating), and worsening swallowing difficulty. Zenker’s diverticulum is almost always found alongside a cricopharyngeal bar at the same level.
Balloon Dilation
For people with mild to moderate symptoms, stretching the muscle with a balloon is often the first intervention tried. During an endoscopic procedure under sedation, a deflated balloon catheter is positioned at the sphincter and inflated to physically widen the opening. Balloon sizes typically range from 15 to 20 mm, with most patients receiving a 20 mm dilation. In one series of 31 patients, 77% needed only a single session, while a small number required two or three sessions to get adequate relief. The procedure can be performed by pulling the inflated balloon backward across the sphincter (a retrograde technique) or by holding it in place for a set period.
Botox Injections
Injecting botulinum toxin directly into the cricopharyngeus muscle temporarily weakens it, allowing it to open more fully during swallows. The toxin’s effect in this muscle lasts roughly four months. What makes this approach notable is that for many patients, the benefit outlasts the drug itself. In a large series of 200 patients treated for a related cricopharyngeal disorder, 95% experienced significant symptom relief after a single injection. Of those who improved, about 80% maintained their gains for six months or longer, with some still doing well years later. The sustained improvement likely happens because the temporary paralysis gives the muscle a chance to reset, breaking a cycle of tightness and allowing normal function to resume.
Botox injections are sometimes used as a diagnostic trial before committing to surgery. If the injection provides clear relief, it confirms the cricopharyngeus is the problem and predicts a good surgical outcome.
Surgical Myotomy
When dilation and Botox don’t provide lasting relief, or when symptoms are severe from the start, a cricopharyngeal myotomy is the definitive treatment. The surgeon cuts through the cricopharyngeus muscle fibers, permanently eliminating the restrictive barrier. This can be done two ways: through an incision in the neck (open approach) or through the mouth using an endoscope.
A comparison of 38 open and 41 endoscopic myotomy patients found that the endoscopic approach resulted in shorter operative times and better symptom outcomes. Complication rates, hospital stays, and time to resuming eating were similar between the two methods. Endoscopic myotomy has become the preferred approach at most centers, though anatomy and the presence of a Zenker’s diverticulum sometimes make the open route more appropriate.
When No Treatment Is Needed
Because a cricopharyngeal bar is so common on imaging, it’s frequently discovered incidentally during swallow studies done for other reasons. If you have no swallowing difficulty and no sensation of throat tightness, the bar itself doesn’t require any intervention. It only becomes a clinical problem when it causes symptoms or when the pressure buildup begins forming a Zenker’s diverticulum. For people with mild, intermittent symptoms, simple strategies like taking smaller bites, chewing thoroughly, and drinking liquid with meals can reduce the resistance the muscle creates.