Gastritis includes acute gastritis and chronic gastritis, as well as some special types of gastritis, different types of diseases caused by different symptoms, often abdominal distension, nausea, vomiting, loss of appetite and other symptoms. 1. Acute gastritis: mainly acute inflammation of the gastric mucosa, the onset of acute, patients with clinical symptoms, often manifested as epigastric pain, burning sensation, abdominal distension, nausea, vomiting and other symptoms. 2. Chronic gastritis: patients usually do not have obvious clinical symptoms, some patients may have a feeling of fullness, burning sensation, epigastric discomfort. In the acute phase of inflammation, stomach pain may occur. 3. Special types of gastritis: such as bacterial infectious gastritis often leads to localized pressure pain, nausea, vomiting, fever and other symptoms; corrosive gastritis patients often appear upper gastrointestinal perforation, gastrointestinal bleeding and other symptoms. There are also some other types of gastritis, clinical symptoms are also different, if the above discomfort symptoms, should be timely consultation, identify the causes, targeted treatment.