What is the primary cause of reflux esophagitis seen in a patient presenting with worsening heartburn?

Gastroesophageal reflux disease (GERD) is the primary cause of reflux esophagitis, particularly in a patient with worsening heartburn. GERD occurs when the lower esophageal sphincter does not function properly, leading to the backflow of stomach contents, including acid, into the esophagus. This exposure to acidic gastric secretions can cause inflammation and irritation of the esophageal lining, resulting in reflux esophagitis.

Patients commonly report symptoms such as heartburn, regurgitation, and difficulty swallowing, which align with the presentation of this condition. The chronic nature of GERD can lead to persistent inflammation if not managed appropriately, further exacerbating symptoms and leading to complications such as esophageal ulcers or strictures.

While viral infections, alcohol abuse, and esophageal strictures can also impact esophageal health, they are less common initial causes for reflux esophagitis compared to GERD. For instance, viral infections such as eosinophilic esophagitis can occur but are typically not as prevalent as GERD. Alcohol abuse can contribute to esophageal irritation but is less likely to be the primary underlying cause in a patient specifically indicating worsening heartburn as the main symptom. Esophageal strictures are often a