Heartburn is a common condition that occurs when stomach acid flows back into the esophagus, the tube that connects your mouth to your stomach. This can cause a burning sensation in the chest or throat, often after eating or when lying down. Many people experience heartburn occasionally, but frequent episodes may indicate a more serious issue, such as gastroesophageal reflux disease (GERD). Certain foods and drinks, like spicy foods, citrus fruits, and coffee, can trigger heartburn. Lifestyle factors, such as being overweight or smoking, can also contribute to the problem. Fortunately, there are various treatments available, including over-the-counter medications and lifestyle changes, to help manage heartburn symptoms.