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Heartburn, also known as pyrosis, cardialgia or acid indigestion, is a burning sensation in the central chest or upper central abdomen. Heartburn is usually due to regurgitation of gastric acid (gastric reflux) into the esophagus. It is the major symptom of gastroesophageal reflux disease (GERD). Other common descriptors for heartburn (besides burning) are belching, nausea, squeezing, stabbing, or a sensation of pressure on the chest. The pain often rises in the chest (directly behind the breastbone) and may radiate to the neck, throat, or angle of the arm. Because the chest houses other important organs besides the esophagus (including the heart and lungs), not all symptoms related to heartburn are esophageal in nature. The cause will vary depending on one's family and medical history, genetics, if a person is pregnant or lactating, and age. As a result, the diagnosis will vary depending on the suspected organ and the inciting disease process. Work-up will vary depending on the clinical suspicion of the provider seeing the patient, but generally includes endoscopy and a trial of antacids to assess for relief. Treatment for heartburn may include medications and dietary changes. Medication include antacids. Dietary changes may require avoiding foods that are high in fats, spicy, high in artificial flavors, heavily reducing NSAID use, heavy alcohol consumption, and decreasing peppermint consumption. Lifestyle changes may help such as reducing weight. The term indigestion includes heartburn along with a number of other symptoms. Indigestion is sometimes defined as a combination of epigastric pain and heartburn. Heartburn is commonly used interchangeably with gastroesophageal reflux disease (GERD) rather than just to describe a symptom of burning in one's chest. Heartburn-like symptoms and/or lower chest or upper abdomen may be indicative of much more sinister and/or deadly disease. Of greatest concern is to confuse heartburn (generally related to the esophagus) with a heart attack as these organs share a common nerve supply.

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Gastroesophageal reflux disease

Gastroesophageal reflux disease (GERD) or gastro-oesophageal reflux disease (GORD) is one of the upper gastrointestinal chronic diseases in which stomach content persistently and regularly flows up into the esophagus, resulting in symptoms and/or complications. Symptoms include dental corrosion, dysphagia, heartburn, odynophagia, regurgitation, non-cardiac chest pain, extraesophageal symptoms such as chronic cough, hoarseness, reflux-induced laryngitis, or asthma.

Antacid

An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Marketed antacids contain salts of aluminium, calcium, magnesium, or sodium. Some preparations contain a combination of two salts, such as magnesium carbonate and aluminium hydroxide (e.g. hydrotalcite). Antacids are available over the counter and are taken by mouth to quickly relieve occasional heartburn, the major symptom of gastroesophageal reflux disease and indigestion.

Indigestion

Indigestion, also known as dyspepsia or upset stomach, is a condition of impaired digestion. Symptoms may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain. People may also experience feeling full earlier than expected when eating. Indigestion is relatively common, affecting 20% of people at some point during their life, and is frequently caused by gastroesophageal reflux disease (GERD) or gastritis. Indigestion is subcategorized as "organic" or "functional", but making the diagnosis can prove challenging for physicians.

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