Acid reflux occurs when stomach acid flows back into the esophagus, leading to a range of uncomfortable symptoms. The most common symptom is heartburn, which often worsens at night or after eating. Many people experience regurgitation, a sensation of acid backing up into the throat or mouth, resulting in a sour or bitter taste. Dysphagia, or difficulty swallowing, can also occur, creating the feeling of food being stuck in the throat. Some individuals may experience chest pain that mimics heart problems, leading to confusion with heart attack symptoms. Irritation of the throat from acid can cause hoarseness or a sore throat, while a chronic cough may persist without any link to respiratory illness. Additionally, acid reflux can lead to bad breath, resulting in an unpleasant odor.