Chest pain is a common reason for emergency room visits. According to the document, chest pain accounts for over 2 million ER visits per year in the US. It can be difficult to determine the underlying cause of chest pain based on symptoms alone. A thorough history and physical exam is important to help differentiate between potentially life-threatening causes like heart attacks versus more benign causes like costochondritis or gastroesophageal reflux. Proper diagnosis and treatment is key to improving outcomes for patients experiencing chest pain.