Hiatal hernia: the finding on your scan is common. The pain needs a better explanation.

Millions of people have a hiatal hernia and never feel it. If yours is being blamed for symptoms that will not respond, read on.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What a hiatal hernia is

The diaphragm is the sheet of muscle that separates your chest from your abdomen and does most of the work of breathing. The oesophagus, the food pipe, passes through an opening in it called the hiatus. A hiatal hernia means the top of the stomach has slipped up through that opening, so part of it sits in the chest rather than below the diaphragm.

This is extremely common, especially with age, and most people who have one never know. The usual way it causes trouble is indirect. The hernia can loosen the lower oesophageal sphincter, the muscular valve that keeps stomach acid where it belongs. When acid escapes upward, you get gastro-oesophageal reflux disease, or GERD: heartburn, regurgitation, sometimes a sore throat or cough. GERD has its own article at GERD and acid reflux.

Large hernias can occasionally cause other problems, and they are usually dealt with surgically. But for the typical small sliding hernia found on an endoscopy or scan, the ATNS index makes a simple point: the hernia matters only if it is causing reflux.

The neuroplastic contribution

Neuroplastic symptoms are real symptoms produced by learned pathways in the brain and nervous system, a sensitized alarm system, rather than by ongoing damage or disease in the body. They are not imaginary and not 'all in your head'. They are reversible, because the brain can change.

The ATNS Index of Neuroplastic Symptoms states that a hiatal hernia produces symptoms through GERD, and that if GERD is not present, or does not respond to treatment as expected, assessing for neuroplastic symptoms is likely to be helpful.

Why would that be? The oesophagus is richly wired to the brain. When the nervous system is sensitized, normal amounts of acid, normal muscle contractions, and even the simple presence of food can be registered as burning, pressure or pain. Gastroenterologists have names for this: reflux hypersensitivity, when ordinary reflux is felt intensely, and functional heartburn, when the burning is present with no abnormal acid at all. The hernia is often an innocent bystander found on the scan and then blamed.

• If acid tests show real reflux and acid-suppressing medicine fixes it, the hernia story holds.
• If acid tests are normal, or you have taken a proton pump inhibitor for months with no change, the nervous system is the more likely driver.

The same sensitization process that keeps chronic pain going keeps the gut's alarm going.

What the research shows

The research here is mostly about the oesophagus rather than the hernia itself, but it maps directly onto the ATNS index's position.

A review of functional heartburn describes it as burning chest discomfort that persists despite optimal acid suppression, diagnosed once GERD, eosinophilic oesophagitis, major motility disorders and structural abnormalities have been excluded, and explains that visceral hypersensitivity and hypervigilance, meaning a nervous system that over-reads normal signals and a mind that watches for them, are central to it. A more recent review of functional heartburn and reflux hypersensitivity discusses how neuromodulator medicines and brain-directed treatments, including gut-directed hypnotherapy and cognitive behavioural therapy, are used because they act on central and peripheral sensitization rather than on acid. A review of PPI-refractory GERD notes that a large share of people who keep having symptoms on acid suppression do not have ongoing abnormal acid exposure and that other mechanisms, including hypersensitivity, must be considered.

Taken together: if acid-blocking does not help, the evidence points toward a sensitized gut-brain pathway, not a stubborn hernia.

Signs the brain may be part of the picture

• Acid testing (pH monitoring) was normal, or endoscopy showed no inflammation, yet your heartburn continues.
• Months of a proton pump inhibitor have made little or no difference.
• Symptoms come in waves tied to stress, anxiety or poor sleep rather than to meals.
• You feel a lump in the throat, chest tightness or burning without regurgitation.
• You have other sensitive-gut symptoms such as bloating, IBS or nausea.

A solution that addresses it

When the oesophagus has become hypersensitive, the work is in calming the alarm system. Pain and symptom reprocessing is an approach built for this. It includes education about neuroplastic symptoms, somatic tracking (noticing the burning or pressure with calm curiosity rather than fear), reducing the sense of threat, a graded return to the foods and activities you have been avoiding, emotional awareness and expression, and acceptance and commitment skills. Trained clinicians deliver it, and digital programs are making it more widely available. It complements, rather than replaces, whatever your gastroenterologist recommends. Our guide to mindfulness and somatic practices introduces the technique.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. If your hiatal hernia has been blamed for symptoms that will not respond, you can join the waitlist.

What to do next

First, get the structural picture clear. Chest pain always needs a heart check first. Seek urgent care for chest pain with sweating, breathlessness or pain spreading to the arm or jaw. Difficulty swallowing, vomiting blood, black stools, or unexplained weight loss need prompt assessment by a doctor.

Second, ask your gastroenterologist whether GERD has actually been confirmed, for example with pH monitoring, and whether your response to acid suppression has been typical. If GERD is absent or unresponsive, ask whether reflux hypersensitivity or functional heartburn, in other words a neuroplastic pattern, could be the explanation. Do not stop any medication without discussing it.

Third, if it might, start learning and practising. The exercise below takes a few minutes, and the conditions index covers related gut-brain conditions.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.