Heartburn is a burning pain in the chest, just behind the breastbone, that is caused by stomach acid backing up into the tube that carries food from the mouth to the stomach (esophagus) . The most common cause of heartburn is gastroesophageal reflux disease (GERD), which occurs when the lower esophageal sphincter (LES) muscle at the bottom of the esophagus relaxes abnormally or weakens, allowing stomach acid to flow back up into the esophagus. Other causes of heartburn include:

• Eating certain foods, such as those that are acidic or high in fat, like citrus fruits, tomatoes, onions, chocolate, coffee, cheese, and peppermint.
• Drinking alcohol or caffeinated beverages, like coffee and tea.
• Smoking, which relaxes the LES muscle and increases stomach acid.
• Being overweight or pregnant, which can put added pressure on the abdomen and stomach.
• Certain medications, such as aspirin or ibuprofen, as well as some sedatives and blood pressure medications.

Symptoms of heartburn include a burning pain in the chest that usually occurs after eating and may occur at night, pain that worsens when lying down or bending over, a sour taste in the mouth, coughing, or hoarseness. Occasional heartburn is common and no cause for alarm, and most people can manage the discomfort of heartburn on their own with lifestyle changes and nonprescription medications. However, heartburn that is more frequent or interferes with daily routine may be a symptom of a more serious condition that requires medical care[[1]](https://www.mayoclinic.org/diseases-condition...