The early symptoms of gastric cancer are not specific or characteristic in clinical presentations, and there are no specific signs either. It can also be said that there are no symptoms or signs at all. Some patients may be diagnosed with gastric cancer after presenting with symptoms of bleeding, such as vomiting blood, blood in stool, or black stools. Therefore, it is recommended for individuals over 40 years old to consider undergoing gastroscopy, especially if they experience discomfort or pain in the upper abdomen, weight loss, or have a history of poor gastric mucosa conditions seen in previous gastroscopies, including atrophy, intestinal metaplasia, or ulcers, as well as a history of testing positive for Helicobacter pylori. Regular follow-up gastroscopies are advised under these circumstances.