Early symptoms of gastrointestinal mesenchymal stromal tumor will not be very obvious, due to the small tumor, some patients may show positive fecal occult blood and atypical gastrointestinal reaction. Positive occult blood in routine stool is mainly due to the presence of tumor, resulting in gastrointestinal mucosal damage caused by bleeding. In addition, it may be accompanied by loss of appetite, nausea, abdominal distension and other atypical gastrointestinal clinical manifestations. With the increase in tumor size, the above symptoms will gradually worsen. As the above early symptoms of gastric mesenchymal tumor are not very obvious, it needs medical examination to confirm the diagnosis, and it is recommended to go to the gastroenterology department of regular hospitals in the morning on an empty stomach for examination if necessary. For people with high risk factors of gastric mesothelioma, such as family history, residents of industrial pollution areas, and people who often consume pickled, hot, smoked food, etc., they should undergo regular gastroscopy.