Digestion

Acid Reflux: Definition, Causes, Diagnosis, Treatment

Created on, Sat April 26 2025
Reviewed by, Kaedoc Medical Team

Acid reflux is a condition in which stomach contents seep backward into the esophagus. These contents sometimes contain excessive acid and may cause irritation and pain.

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Symptoms

The most common symptom of acid reflux is persistent heartburn, which may involve:

Painful burn in your chest that sometimes happens after a meal or if you lie down after eating
Food backing up into your mouth, which may cause an unpleasant sour taste
Affected skin might have foul-smelling skin patches

If acid reflux occurs repeatedly, it may cross the line into chronic condition called gastroesohageal reflux disease (GERD). In addition to chest pain, GERD may lead to longer-term symptoms such as nausea, difficulty swallowing and hoarseness.

Causes

It results from improper functioning of the lower esophageal sphincter (LES).

The LES is a circular band of muscle at the end of your esophagus. When you swallow, it relaxes and opens up to allow food and liquid to travel from your mouth to your stomach. Then, it tightens and closes again.

Acid reflux happens when your LES doesn’t tighten or close properly. This allows digestive juices and other contents of your stomach to rise up into your esophagus

Your LES may not function properly if you:

Frequently eat large meals:

This may cause distension of the upper part of your stomach. This distension sometimes means there isn’t enough pressure on the LES, and it doesn’t close properly.

Lie down too soon after meals:

This might not create enough pressure for the LES to function properly.

Have a hiatal hernia

This occurs when part of your stomach moves above your diaphragm toward your chest. If your diaphragm is compromised, it may prevent your LES from functioning properly.

Other factors, may also contribute to having heartburn more often,

Lifestyle factors

Lifestyle factors that may contribute to persistent reflux with esophageal inflammation include:

Smoking or being exposed to secondhand smoke
Food backing up into your mouth, which may cause an unpleasant sour taste
Using an abundance of nonsteroidal anti-inflammatory drugs such as aspirin and ibuprofen
Excessive alcohol intake
Health factors

Health factors such as the following may contribute to GERD:

Obesity
Pregnancy
Asthma
Irritable bowel syndrome (IBS)
Dietary triggers

Some foods may trigger GERD symptoms more than others, including:

High fat foods such as fried and fast foods
Spicy foods
Certain fruits and vegetables, such as pineapple, tomato, and citrus
Certain liquids, such as coffee, tea, and carbonated drinks

Side Effects Of Acid Reflux

Chronic acid exposure may cause damage from the mouth down through the esophagus:

Tooth decay
Inflammation that alters the esophageal lining which leads to formation of scar tissue that narrows the esophagus , making it difficult to swallow.
Inflammation of the voice box making it sore and inflammed which cause speaking challenging
Bleeding and possibly ulcers

Diagnosis

A doctor will typically take your medical history and perform a physical examination to assess your symptoms.

If you’re experiencing alarm symptoms, such as chest pain or trouble swallowing, they may refer you to a gastroenterologist or request certain tests, including:

Esophagram:

After you drink a barium solution, healthcare professionals use X-ray imaging to examine your upper digestive tract.

Upper endoscopy:

A flexible tube with a tiny camera is threaded into your esophagus to examine it and collect a tissue sample (biopsy) if needed.

Esophageal manometry:

A flexible tube is passed through your nose into your esophagus to measure the strength of your esophageal muscles.

Esophageal pH monitoring:

A monitor is inserted into your esophagus to help healthcare professionals find out how acid is regulated in your body over a few days.

Treatment

Lifestyle strategies

To manage and relieve symptoms of GERD, certain home remedies and lifestyle habits may help, including:

Breathing exercises
Consuming foods and liquids that may help with your acid reflux
Making efforts to maintain a moderate weight
Stop smoking
Making efforts to maintain a moderate weight
Avoiding eating big, heavy meals in the evening
Waiting 2–3 hours after eating to lie down
Medication

A doctor might prescribe medications to decrease your stomach acid secretion, since acid reflux is a common manifestation of GERD:

proton pump inhibitors
antacids
H2 receptor blockers
Surgery

In most cases, lifestyle strategies and medications are enough to prevent and relieve symptoms of GERD. However, a doctor might recommend surgery if these approaches haven’t stopped your symptoms or if you’ve developed complications.

Possible surgery options include:

Fundoplication
LINX reflux management system
Bariatric surgery

References

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