Acute gastritis often presents with symptoms such as acute abdominal pain, bloating, acid reflux, heartburn, nausea, and vomiting. The symptoms are typically more severe than those of chronic gastritis. Whether hospitalization is necessary depends on the specific symptoms. If the symptoms are not severe and the patient can eat, treatment can be achieved through oral medication. If there is severe vomiting or inability to eat, hospitalization for intravenous therapy may be needed. Additionally, acute gastric mucosal lesions caused by certain medications may lead to bleeding, which also requires hospital observation to prevent worsening of the condition. (Specific medications should be used under the guidance of a doctor.)