Indigestion: Causes, Symptoms, Treatment and Prevention Explained

Indigestion is one of the most common digestive complaints, affecting millions of people worldwide each year. While it is usually not a serious condition, persistent or recurring indigestion can sometimes signal an underlying health problem that requires medical attention.

Known medically as dyspepsia, indigestion is not a disease itself but a collection of symptoms that occur after eating or drinking. These symptoms can range from mild discomfort to significant pain and may interfere with everyday life.

Understanding the causes, recognising the warning signs and knowing when to seek medical advice can help prevent complications and improve digestive health.

What Is Indigestion?

Indigestion describes discomfort or pain in the upper part of the abdomen that often occurs during or after eating.

It commonly causes a feeling of fullness, bloating or burning and may occur occasionally or become a recurring problem.

Most episodes resolve without medical treatment, but frequent indigestion should always be assessed by a healthcare professional.

Common Symptoms of Indigestion

Symptoms vary from person to person but often include:

• Pain or discomfort in the upper abdomen
• Feeling full soon after starting a meal
• Uncomfortable fullness after eating
• Bloating
• Excessive burping
• Nausea
• Heartburn (a burning sensation behind the breastbone)
• Acid reflux
• Stomach gurgling
• Feeling sick after meals

Some people may also experience mild vomiting or an unpleasant taste in the mouth if stomach acid flows back into the oesophagus.

What Causes Indigestion?

Indigestion has many possible causes. In some cases, no specific cause is identified.

Eating Habits

The most common triggers include:

• Eating too quickly
• Eating large meals
• Eating late at night
• Lying down soon after eating
• Eating spicy foods
• Fatty or fried foods
• Rich or heavy meals

Drinks That Can Trigger Symptoms

Certain beverages may worsen indigestion, including:

• Coffee
• Alcohol
• Fizzy drinks
• Energy drinks

Smoking

Smoking can weaken the muscle that prevents stomach acid from moving into the oesophagus, increasing the risk of acid reflux and indigestion.

Stress and Anxiety

Emotional stress can affect the digestive system, leading to increased stomach acid production and slower digestion.

Medicines

Some medications may irritate the stomach, including:

• Ibuprofen
• Aspirin
• Naproxen
• Certain antibiotics
• Iron supplements

Never stop prescribed medication without consulting a healthcare professional.

Medical Conditions Linked to Indigestion

Persistent indigestion may be caused by an underlying condition such as:

Gastro-oesophageal Reflux Disease (GORD)

This occurs when stomach acid repeatedly flows back into the oesophagus.

Stomach Ulcers

Ulcers are open sores that develop in the stomach lining and may cause burning stomach pain.

Helicobacter pylori Infection

This common bacterial infection can damage the stomach lining and increase the risk of ulcers.

Gallstones

Gallstones may cause indigestion, particularly after eating fatty foods.

Irritable Bowel Syndrome (IBS)

Although IBS mainly affects the lower digestive tract, bloating and indigestion-like symptoms may occur.

Stomach Cancer

Although uncommon, persistent indigestion—particularly in older adults or when accompanied by weight loss, difficulty swallowing or vomiting blood—requires urgent medical assessment.

Risk Factors

You may be more likely to experience indigestion if you:

• Are overweight
• Smoke
• Drink excessive alcohol
• Eat quickly
• Frequently consume fatty or spicy foods
• Experience chronic stress
• Have certain digestive conditions

How Is Indigestion Diagnosed?

For occasional indigestion, no tests are usually needed.

However, a doctor may recommend further investigation if symptoms are persistent or concerning.

Tests may include:

• Blood tests
• Stool tests
• Breath tests for Helicobacter pylori
• Endoscopy (camera examination of the stomach and oesophagus)
• Ultrasound scan if gallstones are suspected

Treatment for Indigestion

Treatment depends on the underlying cause.

Lifestyle Changes

Many people improve their symptoms by:

• Eating smaller meals
• Eating slowly
• Avoiding late-night meals
• Reducing fatty foods
• Limiting alcohol
• Stopping smoking
• Maintaining a healthy weight

Over-the-Counter Medicines

Pharmacists may recommend:

Antacids

These neutralise stomach acid and provide quick relief.

Alginates

These form a protective barrier that helps prevent acid reflux.

Acid-Reducing Medicines

Medicines known as proton pump inhibitors (PPIs) or H2 blockers reduce stomach acid production and may be recommended by a healthcare professional for persistent symptoms.

Home Remedies That May Help

Some people find relief by:

• Drinking water regularly
• Avoiding lying flat after meals
• Wearing loose-fitting clothing
• Keeping a food diary to identify triggers
• Sleeping with the head slightly elevated if reflux occurs at night

While ginger or peppermint may help some individuals, peppermint can worsen acid reflux in others.

When Should You Seek Medical Help?

Seek urgent medical attention if indigestion is accompanied by:

• Vomiting blood
• Black or tarry stools
• Severe chest pain
• Difficulty swallowing
• Persistent vomiting
• Sudden unexplained weight loss
• Severe abdominal pain
• Anaemia or extreme fatigue

You should also arrange a medical review if indigestion persists for more than a few weeks, keeps returning despite lifestyle changes or over-the-counter treatment, or begins for the first time later in adulthood.

Can Indigestion Be Prevented?

Although not all cases can be prevented, adopting healthy habits can significantly reduce the risk.

Tips include:

• Eat regular, balanced meals.
• Chew food slowly and thoroughly.
• Avoid overeating.
• Limit alcohol and caffeine.
• Stop smoking.
• Manage stress through relaxation techniques or exercise.
• Maintain a healthy weight.
• Avoid lying down immediately after eating.