What Is Acid Reflux? Symptoms, Causes, Treatment and What Helps

Acid reflux is a common digestive system condition that occurs when stomach contents flow back into the esophagus. Medically known as Gastroesophageal Reflux Disease (GERD), this condition develops when stomach contents, particularly stomach acid, as well as bile and undigested food, reach the esophagus. Under normal circumstances, the muscular structure located between the stomach and the esophagus, known as the lower esophageal sphincter, acts as a natural valve that prevents stomach contents from moving upward. Reflux may occur when this mechanism does not function properly.

Occasional heartburn does not usually indicate a serious health problem. However, if these symptoms occur twice or more per week, persist for a long time, or affect daily quality of life, an evaluation for reflux disease may be necessary.

Reflux is not limited to heartburn. Some people may also experience different symptoms, such as a burning sensation in the chest, a sour or bitter taste in the mouth, difficulty swallowing, chronic cough, hoarseness, and a sensation of something being stuck in the throat. For this reason, the condition may sometimes be mistaken for other disorders, and diagnosis may be delayed.

How Does Acid Reflux Develop?

The digestive system is a complex process that begins in the mouth and is completed in the intestines. The food we consume passes through the esophagus and reaches the stomach. The lower esophageal sphincter (LES), located at the lower end of the esophagus, is a ring of muscle that allows food to enter the stomach while preventing stomach contents from flowing back into the esophagus.

When this muscle relaxes, weakens, or fails to perform its function properly, stomach acid flows back into the esophagus. Although the stomach has a protective lining that helps it withstand its strong acidic environment, the esophagus does not have the same level of protection. Therefore, contact with stomach acid may cause irritation, inflammation, and tissue damage over time.

In some people, not only stomach acid but also bile and undigested food may flow upward, causing symptoms to become more severe. The risk of damage to the esophagus may increase, particularly when this condition persists for a long time.

Who Is More Likely to Develop Acid Reflux?

Although reflux can occur at any age, some people have a higher risk of developing it. Lifestyle factors and certain health conditions may make reflux more likely.

Factors that may increase the risk include:

• Overweight or obesity

• Pregnancy

• Smoking

• Regular alcohol consumption

• Eating large portions

• Eating late at night

• Frequent consumption of fatty and spicy foods

• Excessive caffeine consumption

• Heavy consumption of carbonated beverages

• Hiatal hernia

• Use of certain medications

• A sedentary lifestyle

The presence of these factors does not necessarily mean that a person will develop reflux. However, they may make it easier for stomach contents to flow back into the esophagus, increasing the likelihood of the condition.

What Are the Types of Acid Reflux?

Reflux disease can be classified in different ways according to the areas affected by symptoms and the changes it causes in the esophagus.

Gastroesophageal Reflux Disease (GERD)

This is the most common type of reflux. When stomach acid flows back into the esophagus, symptoms such as heartburn, a burning sensation in the chest, and a sour taste in the mouth may occur.

Erosive Reflux

In this type of reflux, irritation caused by stomach acid has reached a level that can be detected during endoscopy. If left untreated, ulcers, bleeding, or narrowing of the esophagus may develop.

Non-Erosive Reflux

In this type, patients experience reflux symptoms even though no significant damage is visible during endoscopy. Nevertheless, the condition may substantially affect quality of life.

Laryngopharyngeal Reflux (Silent Reflux)

Stomach contents may reach the throat and larynx. In these cases, symptoms other than heartburn may be more prominent, including:

• Hoarseness

• A persistent need to clear the throat

• Persistent cough

• A sensation of something being stuck in the throat

• Sore throat in the morning

Is Acid Reflux Contagious?

No. Acid reflux is not a contagious disease. Since it is not caused by a virus, bacterium, or fungus, it cannot spread from person to person through contact. Reflux is a digestive system condition that develops when the protective mechanism between the stomach and the esophagus does not function properly.

Can Acid Reflux Go Away on Its Own?

Occasional heartburn may improve with lifestyle changes. However, if symptoms recur frequently, persist for a long time, or affect daily life, it is important to investigate the underlying cause.

Early diagnosis and an appropriate treatment plan can help prevent the condition from progressing and improve quality of life.

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What Are the Symptoms of Acid Reflux?

Acid reflux does not cause the same symptoms in every individual. While some people experience heartburn only occasionally, others may have complaints that affect areas beyond the digestive system, including the throat and respiratory tract. The severity, frequency, and duration of symptoms may vary from person to person. Reflux symptoms often become more noticeable after meals, when bending forward, or when lying down. In particular, fatty and spicy foods, large portions, and the habit of eating late at night may cause symptoms to worsen.

The most common symptoms of acid reflux include:

• A burning sensation behind the breastbone (heartburn)

• A burning sensation in the esophagus

• A bitter fluid rising into the mouth

• A sour fluid rising into the mouth

• Acid indigestion

• Difficulty swallowing

• A burning sensation in the throat

• A sensation of something being stuck in the throat

• A persistent need to clear the throat

• A persistent dry cough

• Hoarseness in the morning

• Bloating

• Belching

• Indigestion

• Nausea

• Chest pain

Not every patient is expected to experience all these symptoms. Some people may experience only one or two symptoms, while others may have several complaints at the same time.

Heartburn Is the Most Common Symptom of Acid Reflux

Heartburn is the complaint most frequently reported by people with reflux. It usually presents as a burning discomfort felt behind the breastbone. It may become more intense after meals, when bending forward, or when lying down.

Some factors that may worsen heartburn include:

• Fatty foods

• Spicy meals

• Chocolate

• Coffee and caffeinated beverages

• Carbonated drinks

• Alcohol consumption

• Smoking

• Eating large portions

Occasional heartburn does not always mean that a person has reflux disease. However, symptoms that recur frequently and affect quality of life should be evaluated.

What Causes a Burning Sensation in the Esophagus?

A condition commonly described as a “burning sensation in the food pipe” occurs when stomach acid reaches the esophagus. Unlike the stomach, the esophagus does not have a specialized structure that protects it from acid. Therefore, contact with stomach acid may cause irritation. The burning sensation may begin in the chest and extend toward the throat.

During reflux episodes that persist for a long time, inflammation may develop in the esophagus, potentially causing discomfort when swallowing.

A Bitter Fluid Rising into the Mouth

One of the characteristic symptoms of reflux is a bitter fluid rising into the mouth. When stomach contents pass through the esophagus and reach the oral cavity, they may leave a bitter taste in the mouth. This complaint may occur particularly:

• After meals

• When bending forward

• At night while lying down

• In a way that wakes the person from sleep

A Sour Fluid Rising into the Mouth

Many people with reflux report experiencing a sour or metallic taste in their mouths. This occurs when stomach acid reaches the mouth and may be more noticeable, particularly in cases of nighttime reflux.

Patients may describe this symptom as:

• Fluid rising into the throat

• Stomach fluid coming into the mouth

• A sensation of sour liquid

Can Acid Reflux Cause Chest Pain?

Yes. Acid reflux can cause chest pain in some people.

This pain often:

• Is felt behind the breastbone

• Has a burning quality

• May worsen after meals

• May ease with antacid medication

However, chest pain is also an important symptom of heart disease. Therefore, anyone experiencing chest pain for the first time, severe chest pain, or chest pain accompanied by shortness of breath should seek medical attention without delay.

Can a Chronic Cough Be a Symptom of Acid Reflux?

Yes. Chronic cough is one of the most frequently observed symptoms in people with silent reflux, also known as laryngopharyngeal reflux.

When stomach contents reach the throat, they may cause:

• Irritation of the larynx

• Effects on the vocal cords

• A persistent urge to cough

For this reason, reflux may be considered one of the possible causes of a prolonged cough with no clear explanation.

Hoarseness and Throat Problems

Reflux may affect not only the stomach but also the throat.

Symptoms that occur particularly in the morning may include:

• Hoarseness

• A burning sensation in the throat

• A persistent need to clear the throat

• A sensation of something being stuck in the throat

These may be symptoms of silent reflux. Since similar complaints can occur with other conditions, persistent symptoms should be evaluated.

What Is an Acid Reflux Attack?

The term “acid reflux attack” is commonly used to describe a sudden, noticeable increase in the severity of reflux symptoms over a short period. Although it is not defined as a separate disease in medical literature, it is a phrase frequently used by patients. During these episodes, symptoms may significantly affect daily life because stomach acid flows back into the esophagus more intensely.

Symptoms of an Acid Reflux Attack

Symptoms that may occur during an acid reflux attack include:

• Severe heartburn

• A burning sensation in the chest

• A burning sensation in the esophagus

• A bitter or sour fluid rising into the mouth

• A burning sensation in the throat

• Frequent belching

• Nausea

• Indigestion

• A feeling of pressure in the chest

• Discomfort when swallowing

Symptoms may become more intense, particularly after heavy meals, when lying down at night, or when bending forward.

Factors That May Trigger an Acid Reflux Attack

Certain habits may cause reflux symptoms to worsen. These include:

• Very fatty foods

• Spicy foods

• Large portions

• Lying down immediately after eating

• Eating late at night

• Chocolate

• Coffee and other caffeinated beverages

• Carbonated drinks

• Alcohol

• Smoking

• Excess weight

• Tight clothing

• Intense stress

Avoiding these factors may help some people keep their symptoms under control.

When Should Acid Reflux Symptoms Be Taken Seriously?

It is important to seek medical attention in the following situations:

• Heartburn occurring twice or more per week

• Development of difficulty swallowing

• Unexplained weight loss

• Vomiting blood or passing black stools

• Persistent or severe chest pain

• Prolonged hoarseness

• Symptoms that continue despite treatment

Since these symptoms may also indicate digestive system conditions other than reflux, medical evaluation is necessary.

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What Causes Acid Reflux? Risk Factors and Habits That Contribute to Reflux

Acid reflux is a common digestive system condition that develops when stomach contents flow back into the esophagus and may negatively affect quality of life. However, reflux does not develop for just one reason. Daily habits, dietary patterns, certain anatomical characteristics, and various health conditions may all play a role in its development.

The muscular structure located between the stomach and the esophagus, known as the lower esophageal sphincter (LES), normally prevents stomach acid from moving upward. If this muscle weakens or fails to function properly, stomach contents may flow back into the esophagus, causing reflux symptoms.

Not every episode of heartburn means that a person has reflux disease. However, if symptoms recur frequently, persist for a long time, or affect daily life, it is important to investigate the underlying causes.

How Does Acid Reflux Develop?

The ring of muscle located between the esophagus and the stomach allows food to enter the stomach while preventing stomach acid from flowing backward. When this mechanism is disrupted, stomach acid reaches the esophagus. Since the esophagus does not have a natural protective structure against acid, irritation and inflammation may develop over time as a result of contact with stomach acid. In some people, bile or undigested food may also flow upward along with stomach acid, causing symptoms to feel more severe.

The Main Factors That Cause Acid Reflux

Several factors may contribute to the development of reflux. The most common include:

• Inadequate functioning of the lower esophageal sphincter

• Hiatal hernia

• Overweight or obesity

• Unhealthy dietary habits

• Eating late at night

• Lying down immediately after meals

• Smoking

• Alcohol consumption

• Pregnancy

• Use of certain medications

• Intense stress

• Delayed stomach emptying

The presence of one of these factors does not necessarily mean that reflux will develop. However, having multiple risk factors at the same time may increase the likelihood of experiencing reflux.

Does Excess Weight and Obesity Increase the Risk of Acid Reflux?

Excess weight is one of the important risk factors associated with the development of reflux. An increase in abdominal fat may place pressure on the stomach. This increased pressure may make it easier for stomach contents to flow back into the esophagus. Research indicates that reflux symptoms may occur more frequently, particularly in people with a larger waist circumference. Maintaining a healthy body weight may help reduce reflux symptoms in some people.

Can a Hiatal Hernia Cause Acid Reflux?

A hiatal hernia is one of the anatomical conditions most commonly associated with reflux. Under normal circumstances, the stomach is located below the diaphragm. However, with a hiatal hernia, part of the stomach may move upward through an opening in the diaphragm into the chest cavity. This may disrupt the protective mechanism between the stomach and the esophagus, making it easier for stomach acid to flow upward.

Nevertheless, not everyone with a hiatal hernia develops reflux. Similarly, not everyone with reflux is expected to have a hiatal hernia.

How Do Dietary Habits Affect Acid Reflux?

Dietary habits may play an important role in the onset or worsening of reflux symptoms. Certain foods and drinks may make it easier for stomach acid to flow back into the esophagus or may aggravate existing symptoms.

Foods that are most frequently reported as triggers include:

• Fatty foods

• Fried foods

• Spicy meals

• Hot sauces

• Chocolate

• Mint

• Tomatoes and tomato-based products

• Citrus fruits

• Onions

• Garlic

• Carbonated drinks

• Coffee

• Excessive tea consumption

• Energy drinks

• Alcohol

These foods do not have the same effect on everyone. Observing which foods worsen an individual's symptoms and limiting them when necessary may be helpful.

Can Eating Late at Night Trigger Acid Reflux?

Eating heavy meals in the evening or eating close to bedtime may worsen reflux symptoms. When a person lies down immediately after eating, the protective effect of gravity is reduced, making it easier for stomach contents to flow back into the esophagus. Therefore, finishing the evening meal a few hours before bedtime may be beneficial for people who experience reflux symptoms.

Is It Harmful to Lie Down Immediately After Eating?

Lying down or going to sleep immediately after a meal may increase the risk of stomach acid flowing back into the esophagus. Remaining upright helps keep stomach contents down. For this reason, sitting upright or staying on one's feet for a while after eating may help control reflux symptoms.

Does Smoking Affect Acid Reflux?

Smoking is one of the important factors that may worsen reflux symptoms.

Smoking is thought to contribute to:

• Relaxation of the lower esophageal sphincter

• Reduced saliva production

• Slower clearance of the esophagus

These effects may cause stomach acid to remain in contact with the esophagus for a longer period.

Can Alcohol Consumption Worsen Acid Reflux?

Alcohol may increase stomach acid secretion in some people and affect the protective mechanism between the stomach and the esophagus. Therefore, symptoms may become more noticeable after alcohol consumption in people who experience reflux.

Why Is Acid Reflux Common During Pregnancy?

Acid reflux is a common complaint during pregnancy.

The main reasons include:

• Hormonal changes

• Pressure on the stomach from the growing uterus

• Slower digestion

Reflux during pregnancy may often improve after childbirth. However, medication use during pregnancy should always be planned in accordance with a healthcare professional's advice.

Can Stress Cause Acid Reflux?

It has not been conclusively demonstrated that stress directly causes reflux. However, existing reflux symptoms may feel more noticeable during periods of intense stress.

Stress may also worsen reflux symptoms indirectly through factors such as:

• Irregular eating habits

• Eating too quickly

• Increased smoking

• Increased caffeine consumption

What Can Be Done to Reduce the Risk of Acid Reflux?

Certain lifestyle changes may help control reflux symptoms.

• Maintain a healthy body weight.

• Eat smaller portions.

• Avoid lying down immediately after meals.

• Avoid eating late at night.

• Engage in regular physical activity.

• Limit smoking and alcohol consumption.

• Identify foods that worsen symptoms and reduce their consumption.

These recommendations may not produce the same results for everyone. If reflux symptoms persist, evaluation by a gastroenterology specialist is important.

Habits That Increase the Risk of Acid Reflux

Daily habits may play an important role in the onset of reflux symptoms or the worsening of existing complaints. Certain behaviors that place strain on the digestive system may make it easier for stomach contents to flow back into the esophagus.

Habits that may increase the risk of reflux include:

• Eating too quickly

• Not chewing food sufficiently

• Eating large portions

• Drinking insufficient water throughout the day

• Frequently consuming carbonated drinks

• Consuming excessive amounts of coffee and caffeinated beverages

• Smoking

• Drinking alcohol

• Lying down immediately after eating

• Wearing tight clothing or belts that constrict the abdomen

• Leading a sedentary lifestyle

• Being overweight or obese

Reviewing these habits and making appropriate lifestyle changes may help reduce reflux symptoms in some people.

Can Acid Reflux Be Prevented?

It may not always be possible to prevent reflux completely. However, adopting healthy lifestyle habits may help reduce the risk of developing the condition and control existing symptoms.

Recommendations for reducing the risk of reflux include:

• Making an effort to maintain an ideal body weight

• Eating a balanced diet at regular intervals

• Eating smaller portions

• Finishing the evening meal a few hours before bedtime

• Avoiding lying down immediately after meals

• Engaging in regular physical activity

• Limiting smoking and alcohol consumption

• Reducing foods and drinks identified as triggers as much as possible

These recommendations may not produce the same results for everyone. If reflux symptoms recur frequently or affect quality of life, evaluation by a gastroenterology specialist is important.

Emsey Medical Editorial Board