Acute gastritis is generally caused by drugs or stress, resulting in acute gastric mucosal injury. For treatment, proton pump inhibitors such as esomeprazole or pantoprazole can be used to suppress stomach acid. Alternatively, H2 receptor antagonists like cimetidine or famotidine can be used, but their effects are not as good as those of proton pump inhibitors. In addition to acid-suppressing medications, drugs that protect the gastric mucosa should also be used. Moreover, if there is damage to the gastric mucosa, treatments that promote the repair of the gastric mucosa, such as the recovery solution, should be applied. Diet should also be considered, ensuring it is light and regular. The cause should be clearly identified; if it is drug-induced, the drug should be discontinued, and if it is due to emotional stress, efforts should be made to soothe the emotions. (Specific medications should be used under the guidance of a doctor)