Gastric mesenchymal tumor usually has no obvious symptoms in the early stages. Gastric mesenchymal tumor is a kind of tumor originating from the mesenchymal tissue of the gastrointestinal tract. Most early stage patients do not have obvious symptoms because the mesenchymal tumor is small in size in the early stage, so the patients will not have obvious symptoms. As the disease progresses, patients may experience discomfort such as pain after meals, difficulty swallowing, epigastric pain, and vomiting. These are atypical symptoms and there is some individual variation. If the patient’s disease progresses, it may cause gastrointestinal symptoms, including black stools and vomiting blood. Patients who discover gastric mesothelioma should seek prompt medical attention and receive regular treatment under the guidance of a medical professional.