Stomach pain, nausea and desire to vomit are not necessarily stomach cancer; stomach cancer does not necessarily have the symptoms of stomach pain, nausea and desire to vomit either. The symptoms of stomach cancer mainly include the following categories: 1. symptoms of stomach, which may include stomach pain, bloating, nausea and vomiting, as well as abdominal masses, etc. 2. some patients with stomach cancer may have systemic symptoms, such as wasting and weakness due to the consumption of tumor. 3. some other patients may have symptoms of anemia and bleeding, mainly manifested as black stool, blood in stool or nausea and vomiting, or even vomiting blood. They may even vomit blood. In addition, some patients with stomach cancer do not have any symptoms and need to undergo relevant tests to detect them.