Chronic gastritis and gastroesophageal reflux disease (GERD) manifest clinically with typical symptoms including abdominal pain, bloating, nausea, heartburn, and acid reflux, generally starting with gastrointestinal symptoms and often with a prolonged history. In cases presenting with abdominal pain, this generally occurs in the upper abdomen and can be characterized as dull, distending, or burning pain. These symptoms are usually related to diet, and some patients may feel better after eating. There is generally no associated nighttime pain, fever, or jaundice. GERD typically presents with heartburn and acid reflux, which are commonly seen in clinical settings. The symptoms are usually more noticeable after eating, especially after a full meal, and do not usually occur at night. The pain, generally a burning sensation, occurs in the precordial and esophageal areas and can be episodic, spontaneously resolving. There may occasionally be nausea, and even a tendency to vomit. Diagnosis of GERD primarily relies on gastroscopic examination.