A “high hernia” is almost certainly a hiatal hernia, a condition where part of the stomach pushes upward through an opening in the diaphragm and into the chest cavity. It’s one of the most common digestive conditions, affecting roughly 1 in 6 people under age 50 and more than 1 in 3 people over 80. Most hiatal hernias cause no symptoms at all and are discovered incidentally during tests for other problems. When they do cause symptoms, they’re usually manageable without surgery.
How a Hiatal Hernia Forms
Your diaphragm is a large dome-shaped muscle separating your chest from your abdomen. Your esophagus (the tube connecting your throat to your stomach) passes through a small gap in the diaphragm called the esophageal hiatus before connecting to the stomach below. A hiatal hernia develops when part of the stomach slides or pushes up through that gap.
This can happen gradually as the muscles around the opening weaken with age, which explains why prevalence climbs steadily: about 16.5% in people 50 and younger, 31.3% in those between 61 and 70, and 37.3% in people over 81. Obesity, pregnancy, chronic coughing, heavy lifting, and anything that creates sustained pressure in the abdomen can speed the process along.
The Four Types
Not all hiatal hernias look the same. They’re classified into four types based on what’s pushing through and how far.
- Type I (sliding hernia): The most common by far, accounting for up to 99% of cases. The junction where the esophagus meets the stomach slides upward through the diaphragm. It often moves back and forth, slipping up when you lie down or strain and dropping back when you stand.
- Type II (paraesophageal): Part of the stomach bulges up alongside the esophagus into the chest, while the esophageal-stomach junction stays in its normal position. This is rarer but carries more risk of complications.
- Type III (mixed): A combination of the first two types, where both the junction and a portion of the stomach migrate upward.
- Type IV (giant): The rarest form, occurring in roughly 0.1% of hiatal hernia cases. A large portion of the stomach, and sometimes other organs like the colon or spleen, herniate through the opening into the chest.
Common Symptoms
Most people with a sliding hiatal hernia have no symptoms. When symptoms do appear, they overlap heavily with acid reflux because the hernia disrupts the natural barrier that keeps stomach acid out of the esophagus. The most common complaints include:
- Heartburn: A burning sensation in the chest, especially after eating or when lying down.
- Chest pain: Recurring pain that can feel alarmingly similar to heart-related chest pain but isn’t.
- Burping and regurgitation: Food, gas, or acid rising back into the throat.
- Difficulty swallowing: A sensation of food getting stuck or a lump in the throat.
The chest pain connection is worth knowing about. Many people with a hiatal hernia end up in the emergency room thinking they’re having a heart problem, only to learn the pain is coming from their stomach or esophagus. If you have unexplained chest pain, it still needs evaluation, but a hiatal hernia is one of the more common non-cardiac explanations.
How It’s Diagnosed
A hiatal hernia is often found during testing for heartburn or upper abdominal pain rather than being specifically looked for. Three main tests can reveal one. An upper GI X-ray involves swallowing a chalky liquid that coats the digestive tract, making the outline of the esophagus and stomach visible on imaging. An endoscopy uses a thin, flexible tube with a camera threaded down the throat to directly view the esophagus and stomach and check for inflammation. A third test, esophageal manometry, measures how well the muscles in the esophagus contract when you swallow, which can help determine whether the hernia is affecting normal function.
Treatment Without Surgery
For the vast majority of people with a Type I sliding hernia, treatment focuses on controlling acid reflux symptoms rather than fixing the hernia itself. Acid-reducing medications are the first-line approach, and lifestyle changes can make a significant difference on their own. Eating smaller meals, avoiding food within two to three hours of lying down, losing weight if you carry extra pounds, and elevating the head of your bed by six to eight inches all reduce the frequency of acid washing back up through the weakened opening.
Certain foods tend to make symptoms worse: spicy or fatty foods, chocolate, caffeine, alcohol, and citrus. You don’t necessarily need to eliminate all of these permanently, but identifying your personal triggers and reducing them can cut down on flare-ups substantially.
When Surgery Becomes Necessary
Surgery is considered when symptoms don’t respond to medication and lifestyle changes, or when the hernia type itself poses a physical risk. Paraesophageal hernias (Types II through IV) are treated more aggressively because a portion of the stomach sitting in the chest can become trapped or twisted. That situation, called strangulation, cuts off blood supply to the stomach tissue and carries about a 5% risk in paraesophageal hernias. It can be fatal without emergency surgery.
The most common surgical procedure wraps the top of the stomach around the lower esophagus to reinforce the barrier against acid reflux, then repairs the opening in the diaphragm. It’s typically done laparoscopically through small incisions. Recovery follows a structured diet progression: clear liquids for about two days, full liquids for another three days, then soft foods for roughly two weeks before gradually returning to a normal diet.
One thing to be realistic about: recurrence rates after surgery are higher than many people expect. In a study of 862 paraesophageal hernia repairs, the anatomical recurrence rate was 27.3% over a median follow-up of about three years. Of those recurrences, 45% caused symptoms, and about 29% of symptomatic patients needed a second operation. That doesn’t mean surgery isn’t worthwhile, but it helps to go in understanding that a single procedure isn’t always a permanent fix.
Serious Complications to Watch For
For people with small sliding hernias, serious complications are uncommon. The bigger concern is with paraesophageal hernias, where part of the stomach can become trapped above the diaphragm. This can lead to the stomach twisting on itself, cutting off blood flow or creating a blockage. Sudden severe chest or upper abdominal pain, inability to vomit despite feeling the urge, and difficulty swallowing anything at all are warning signs that the hernia may have become trapped or twisted. This is a surgical emergency.
Long-standing hiatal hernias can also cause slow, chronic bleeding from irritation where the stomach rubs against the diaphragm, sometimes leading to iron-deficiency anemia that develops so gradually you don’t notice it until a blood test picks it up.