Regurgitation: Food or Acid Coming Back Up

What regurgitation means

In medicine, regurgitation means something flowing backward. For the digestive tract, it means stomach contents or food in the esophagus moving back up into the throat or mouth. Doctors separate it from two similar symptoms:

The word is also used for heart valves ("mitral regurgitation"), which is a different topic entirely.

Acid regurgitation vs food regurgitation

The taste and timing give strong clues:

• Sour or bitter liquid, often after meals, when bending or lying down, often with heartburn: acid reflux from the stomach.
• Undigested food, tasting as it did when swallowed, sometimes hours later or on the pillow at night: food that never reached the stomach, suggesting achalasia or a pouch.
• Partly digested, foul food with bloating and vomiting: delayed stomach emptying or a blockage at the stomach outlet.

Causes of regurgitation

Gastroesophageal reflux disease (GERD)

GERD is by far the most common cause. The valve between the esophagus and stomach (lower esophageal sphincter) relaxes when it should not, letting acid rise. Regurgitation and heartburn are its two typical symptoms. Triggers include large or fatty meals, lying down within 3 hours of eating, alcohol, coffee, chocolate, peppermint, smoking, pregnancy and excess weight.

Hiatal hernia

In a hiatal hernia, part of the stomach slides up through the diaphragm into the chest, weakening the anti-reflux barrier. Large hernias cause regurgitation, especially when lying flat.

Achalasia

Achalasia is a rare nerve disorder where the esophagus loses its squeezing action and the lower sphincter fails to open. Food and liquid pile up and come back up undigested. Swallowing difficulty for both solids and liquids, chest pain, night-time coughing and weight loss are typical. It is often misdiagnosed as GERD for years.

Zenker's diverticulum

A Zenker's diverticulum is a pouch at the top of the esophagus, usually in people over 60. Food collects in it and comes back up later, with bad breath, gurgling in the neck, and coughing or choking when lying down.

Narrowing of the esophagus

Esophageal strictures from long-term acid damage, eosinophilic esophagitis, and esophageal cancer cause food to stick and come back up. Progressive swallowing trouble with weight loss needs prompt investigation.

Stomach emptying problems

Gastroparesis (slow stomach emptying, common in long-standing diabetes) and gastric outlet obstruction cause fullness, bloating, nausea and regurgitation or vomiting of old food.

Rumination syndrome

In rumination syndrome, food comes back up within minutes of most meals through an unconscious contraction of the abdominal wall. It is a behavioral disorder, not reflux, and responds to diaphragmatic breathing training rather than acid medicines.

Regurgitation in babies

Most healthy babies spit up, which peaks around 4 months and resolves by 12 to 18 months as the valve matures. It needs a doctor's review if a baby is not gaining weight, refuses feeds, vomits forcefully, brings up green bile or blood, or seems in pain. Forceful projectile vomiting in a baby aged 2 to 8 weeks can be pyloric stenosis.

Symptoms that often come with regurgitation

• heartburn and chest discomfort
• sour taste and bad breath
• hoarseness, throat clearing and a feeling of a lump in the throat
• chronic cough or wheeze, worse at night
• dental erosion
• difficulty swallowing

How doctors find the cause

Typical GERD in a younger person without warning signs is often treated first without tests. Investigations are used for alarm symptoms or when treatment fails:

• Upper endoscopy: a camera examines the esophagus and stomach and takes biopsies.
• Barium swallow: X-rays while you swallow contrast. Good for achalasia, pouches and strictures.
• Esophageal manometry: pressure sensors measure how the esophagus squeezes. This confirms achalasia.
• 24-hour pH or pH-impedance monitoring: measures reflux episodes.
• Gastric emptying study: for suspected gastroparesis.

Treatment

Lifestyle measures for reflux

• eat smaller meals and finish eating 3 hours before lying down
• raise the head of the bed by 15 to 20 cm (6 to 8 inches) with blocks or a wedge
• lose weight if overweight, which is one of the most effective measures
• avoid your personal trigger foods and drinks
• stop smoking

Medicines

• Antacids and alginates (follow the label dose) give quick, short-term relief. Alginates form a raft that reduces regurgitation in particular.
• H2 blockers such as famotidine reduce acid.
• Proton pump inhibitors (PPIs) such as omeprazole are the most effective for GERD. Taken 30 to 60 minutes before breakfast. PPIs reduce acid but do not stop the backflow itself, so regurgitation improves less than heartburn.

Procedures

• Fundoplication or magnetic sphincter augmentation: anti-reflux surgery for people with significant regurgitation despite medicines.
• Achalasia: pneumatic dilation, Heller myotomy or POEM (an endoscopic muscle cut).
• Zenker's diverticulum: endoscopic or surgical division of the pouch wall.
• Strictures: stretching (dilation) during endoscopy.

Frequently asked questions

What is regurgitation?

Regurgitation is the effortless return of stomach or esophageal contents into the throat or mouth, without nausea or retching. It is most often caused by acid reflux, but undigested food coming up can signal an esophageal problem such as achalasia or a pouch.

What is the difference between regurgitation and vomiting?

Vomiting is forceful: nausea and retching precede it, and the stomach and abdominal muscles contract to expel the contents. Regurgitation is passive. Contents simply flow back up, often with no warning other than a sour taste.

Why does undigested food come back up hours after eating?

Food that returns undigested hours later probably never reached the stomach. Achalasia, a Zenker's pouch or a narrowing of the esophagus can hold food back. This needs investigation with a barium swallow, endoscopy or manometry.

Is regurgitation a sign of GERD?

Yes. Regurgitation and heartburn are the two classic symptoms of gastroesophageal reflux disease. Having them more than twice a week, or having complications such as cough or hoarseness, suggests GERD rather than occasional reflux.

Can regurgitation be dangerous?

Usually not, but it can cause problems if contents are inhaled, leading to cough, pneumonia or asthma flares, or if long-term acid damages the esophagus. Regurgitation with swallowing difficulty, weight loss or bleeding needs prompt investigation.