Gastritis and gastric cancer can be identified mainly by symptoms, signs and symptoms, as well as gastroscopy and pathologic examination. Some symptoms such as nausea and abdominal distension are common to these two diseases, so it is not easy to differentiate them, which still need to be determined by laboratory examination in the hospital. Gastritis and gastric cancer can be identified as follows. 1. Gastritis is divided into two kinds: acute and chronic, which should be manifested as epigastric pain, abdominal distension, belching, loss of appetite, nausea, vomiting, belching, acid reflux and nausea . (1) Acute gastritis is not difficult to diagnose based on history and symptoms. Acute erosive hemorrhagic gastritis is diagnosed by emergency gastroscopy. Acute corrosive gastritis is mainly based on the history of swallowing corrosive agents to make a diagnosis. (2) The diagnosis of chronic gastritis depends on gastroscopy and biopsy of gastric mucosa. Gastroscopy can be differentiated from gastric cancer, gastric ulcer and other diseases. 2. Pain and weight loss are the most common clinical symptoms of progressive gastric cancer. When the tumor destroys blood vessels, gastrointestinal bleeding symptoms such as vomiting blood and black stool can be seen. If the tumor invades the pancreatic peritoneum, persistent pain radiating to the lumbar back can be seen, and severe pain or even peritoneal irritation can be caused by perforation of the tumor ulcer, jaundice can be seen when the tumor develops hepatic hilar lymph node metastasis or compresses bile ducts, and when there is distant lymph node metastasis, enlarged lymph nodes can be detected in the left supraclavicular region. 3. The examination means of gastric cancer mainly include fiberoptic gastroscopy, tumor marker, spiral CT with positron emission imaging, X-ray barium meal examination, abdominal ultrasound and so on. The examination of gastritis is mainly through gastroscopy, pathological examination, pepsinogen determination, Helicobacter pylori examination, gastric fluid analysis and other means. So once the epigastric pain, bloating, belching, loss of appetite and other symptoms must be timely medical treatment, according to the specific results of the scientific and reasonable treatment.