The difference between acute gastritis and chronic gastritis

The main differences between acute gastritis and chronic gastritis lie in the characteristics of onset, symptom presentation, and causes. 1. **Characteristics of onset**: Acute gastritis has a sudden onset and short course of disease, usually within one month; chronic gastritis has a long course of disease, persisting for more than three months. 2. **Symptom presentation**: Symptoms of acute gastritis are more severe, commonly including abdominal pain, nausea, and vomiting, and may be accompanied by fever. Symptoms of chronic gastritis are relatively milder, primarily including stomach pain, abdominal distension, and indigestion, with some cases accompanied by nausea and vomiting. 3. **Causes**: Acute gastritis is often caused by acute bacterial infections, consumption of spoiled food, excessive alcohol intake, and similar factors. Chronic gastritis is associated with long-term gastric acid irritation, Helicobacter pylori infection, medication-induced injury, and other contributing factors.