Which of the following is a symptom that may indicate alarm in a patient with GERD?

Dysphagia, or difficulty swallowing, is a symptom that can indicate alarm in a patient with gastroesophageal reflux disease (GERD) because it may suggest a more serious underlying condition such as esophageal stricture, esophagitis, or even malignancy. While heartburn, bloating, and nausea are common symptoms associated with GERD, they are typically not alarming unless accompanied by other concerning features. Dysphagia raises suspicion for complications related to GERD and warrants further investigation to rule out these potentially serious issues. Identifying alarm symptoms like dysphagia in patients with GERD is crucial for ensuring appropriate management and prevention of more severe outcomes.