What commonly causes esophagitis?

Esophagitis is primarily caused by inflammation of the esophagus, which can result from various factors, with infections, bacteria, and irritation being the most common. This inflammation can occur due to several reasons, including infections from viruses (such as herpes or cytomegalovirus), bacteria, or fungi (like Candida) that can take hold in individuals with weakened immune systems. Additionally, irritants such as stomach acid from conditions like gastroesophageal reflux disease (GERD), or certain medications that may irritate the esophagus when not swallowed properly, can lead to esophagitis.

Other factors listed, such as obesity, high fiber diets, and excessive physical activity, do not directly cause esophagitis. While obesity can contribute to gastroesophageal reflux, it is not a direct cause of esophagitis itself. A high fiber diet is generally beneficial and not known to cause inflammation in the esophagus. Similarly, while excessive physical activity can cause transient changes in the body, it does not cause esophagitis directly. Thus, the most significant and commonly recognized causes of esophagitis are infections, bacteria, and irritation.