A chest hernia occurs when an organ, usually part of the stomach or intestine, pushes through the diaphragm and into the chest cavity. The diaphragm is the large, dome-shaped muscle that separates your abdomen from your chest. It has natural openings and areas of relative weakness, and a hernia develops when tissue bulges through one of those spots. The most common version by far is a hiatal hernia, which affects roughly 55% to 60% of people over age 50.
How the Diaphragm Creates an Opening
Your diaphragm has a small opening called the hiatus, which your esophagus (the swallowing tube) passes through on its way to the stomach. Normally, this opening fits snugly around the esophagus. Over time, the muscle tissue around the hiatus can weaken and stretch, allowing the upper portion of the stomach to slide upward into the chest. This is what most people mean when they refer to a chest hernia.
Less commonly, a chest hernia can occur through other parts of the diaphragm. These are called congenital diaphragmatic hernias when they result from a developmental defect present at birth, or traumatic diaphragmatic hernias when caused by an injury like a car accident or a penetrating wound. Both are far less common than hiatal hernias.
Types of Chest Hernias
Hiatal Hernias
Hiatal hernias come in several forms. A sliding hiatal hernia (type 1) is the most common. The junction where the esophagus meets the stomach slides upward through the hiatus into the chest. Most hiatal hernias are this type, and many cause no symptoms at all.
A paraesophageal hernia (type 2) is less common but more concerning. In this case, the junction between the esophagus and stomach stays in place, but a portion of the stomach squeezes up through the hiatus and sits next to the esophagus inside the chest. A type 3 hernia is a combination of both: the junction moves upward and part of the stomach folds up alongside the esophagus. In large paraesophageal hernias, the stomach can twist on itself, a condition that requires emergency treatment.
Congenital Diaphragmatic Hernias
Babies can be born with a hole in the diaphragm that allows abdominal organs to push into the chest during fetal development. The two main types are named for the part of the diaphragm affected. A Bochdalek hernia is a defect in the back and side of the diaphragm. It typically causes symptoms right after birth because the displaced organs crowd the developing lungs, preventing them from growing fully.
A Morgagni hernia is a defect near the front of the diaphragm, just behind the breastbone. About 90% occur on the right side. These tend to be far less dramatic at birth. Up to 50% of people with a Morgagni hernia have no symptoms when it’s discovered, and the diagnosis is sometimes not made until adulthood, when a chest X-ray done for an unrelated reason reveals the defect.
What Causes a Chest Hernia
For hiatal hernias, the primary driver is a gradual weakening of the muscle tissue around the hiatus. Age is the biggest risk factor. Anything that repeatedly increases pressure inside the abdomen can accelerate the process: obesity, pregnancy, chronic coughing, heavy lifting, or straining during bowel movements. Hiatal hernias are more common in women, likely because of the elevated abdominal pressure during pregnancy, and they are far more prevalent in Western Europe and North America than in rural Africa.
Traumatic chest hernias result from blunt or penetrating injuries to the torso. A high-speed car crash, for example, can tear the diaphragm and allow abdominal contents to herniate into the chest. Previous chest or abdominal surgery can also create a weak point in the diaphragm.
Symptoms to Recognize
Many small hiatal hernias produce no symptoms whatsoever. When symptoms do appear, they tend to fall into two categories: digestive and respiratory.
On the digestive side, the most common complaint is heartburn and acid reflux. Because the hernia disrupts the normal barrier between the stomach and esophagus, stomach acid flows backward more easily. You may notice a burning sensation in the chest, a sour taste in the back of the throat, difficulty swallowing, or a feeling of fullness after eating small amounts.
Respiratory symptoms are less obvious but still common. When part of the stomach sits inside the chest cavity, it can press against the lungs or restrict the diaphragm’s movement. This can cause shortness of breath, especially after meals or when lying down. Some people experience chest pain that can mimic a heart problem, which is one reason chest hernias sometimes come to light during a cardiac workup.
In rare cases, a paraesophageal hernia can become an emergency. If the herniated portion of the stomach gets trapped (incarcerated) or its blood supply gets cut off (strangulated), symptoms escalate quickly: severe chest or abdominal pain, inability to swallow, vomiting, and sometimes signs of shock. The risk of needing emergency surgery for a paraesophageal hernia is estimated at 0.7% to 7%, with a long-term complication rate of roughly 1% to 2% per year.
How It’s Diagnosed
Chest hernias are often found incidentally on imaging done for other reasons. A standard chest X-ray can sometimes reveal a paraesophageal hernia by showing a pocket of air or fluid behind the heart that shouldn’t be there.
For a more detailed look, doctors typically use a barium swallow study, where you drink a chalky liquid that coats your esophagus and stomach so they show up clearly on X-rays. This test reliably identifies hiatal hernias larger than 2 centimeters. Smaller ones can be tricky to measure precisely. A CT scan provides the most detailed picture and is especially useful for traumatic or congenital hernias, where the exact size and contents of the hernia need to be mapped before surgery. Upper endoscopy, where a thin camera is passed down the throat, can also confirm a hiatal hernia and check for related damage to the esophagus.
Treatment Options
Small, asymptomatic hiatal hernias often need no treatment. If acid reflux is the main issue, managing it with lifestyle changes is usually the first step. Eating smaller meals, avoiding food within a few hours of bedtime, elevating the head of your bed, losing weight, and limiting foods that trigger reflux (spicy or acidic foods, alcohol, caffeine) can all help. Acid-reducing medications are commonly used when lifestyle changes alone aren’t enough.
Surgery becomes an option when symptoms are severe, when medications don’t control reflux adequately, or when the hernia is large enough to pose a risk of complications. Paraesophageal hernias are generally considered for surgical repair even without symptoms, because of the risk of the stomach becoming trapped or losing blood supply. Congenital diaphragmatic hernias and traumatic hernias also require surgical repair.
The most common surgical approach is laparoscopic repair, done through several small incisions rather than one large one. The surgeon pulls the herniated tissue back into the abdomen and tightens the opening in the diaphragm, often reinforcing it with mesh. In hiatal hernia repair, the surgeon also typically wraps the upper part of the stomach around the lower esophagus to rebuild the barrier against acid reflux.
Recovery After Surgery
Most people return to desk work within one to two weeks after laparoscopic repair. Jobs requiring heavy lifting or bending take longer, and your surgeon will set specific restrictions at your follow-up appointment. Driving is generally fine once you’ve stopped taking prescription pain medication and your reaction time feels normal.
Diet changes are the biggest adjustment in the early weeks. You’ll start with liquids immediately after surgery, then gradually add soft foods over the first few days. Swelling around the esophagus from the procedure can make food feel like it’s getting stuck on the way down. This difficulty swallowing typically lasts six to eight weeks and resolves on its own as the tissue heals. After the initial recovery period, most people tolerate a full range of foods without trouble. The full return to feeling normal can take anywhere from a few weeks to a few months.