How long it takes to return to normal with acute gastritis depends on the severity of the condition. Usually two weeks or less is usually enough for recovery. Acute gastritis is usually caused by acute damage to the gastric mucosa due to improper diet, taking irritating drugs or stress, trauma. The usual clinical manifestations are abdominal pain, acid reflux, nausea, vomiting and fever. Patients with mild symptoms usually recover on their own in 1 to 2 days. For moderate or severe patients, symptomatic treatment can be carried out by taking medication or infusion as prescribed by the doctor. Commonly used drugs include Hâ‚‚ receptor antagonists such as famotidine and proton pump inhibitors such as omeprazole, which inhibit gastric acid. Symptoms usually resolve well within a week of taking the medication. If H. pylori infection is present, a 2-week course of treatment is required. In conclusion, acute gastritis can usually return to normal in less than half a month after active treatment.