Gastroesophageal reflux disease (GERD) is normally diagnosed using a combination of physical exams, diagnostic testing, and a study of medical history. Your doctor could inquire about your signs, your triggers, and your way of life. Additionally, they could carry out imaging tests like a barium swallow or esophageal manometry, upper endoscopy to inspect the esophagus and stomach, pH monitoring to determine the amount of acid in the esophagus, and another testing. These tests assist in identifying the existence and extent of GERD and help inform therapy choices.