Gastroesophageal reflux disease (GERD) is a series of symptoms or complications caused by the reflux of stomach contents into the esophagus due to various reasons. Gastroscopy should be performed as soon as possible, and lifestyle modification and medication should be carried out under the guidance of a doctor. Lifestyle modification includes calmness and slow chewing, and medication includes acid-suppressing drugs and gastrointestinal motility-regulating drugs.