The difference between gastritis and gastric cancer is still very big, but it is easy to be confused with the symptoms, which need to be distinguished with the help of gastroscopy or barium meal and other relevant examinations. More than 70% of early gastric cancer has no obvious symptoms, and with the development of the disease, non-specific symptoms similar to gastritis or gastric ulcer can gradually appear, including fullness, discomfort or hidden pain in the upper abdomen, acidity, belching, nausea, occasional vomiting, and appetite loss, etc. Indigestion, black stools, etc., are some of the symptoms of gastritis, occasional vomiting, loss of appetite, indigestion, black stools, etc. Symptoms of progressive gastric cancer (i.e. middle and advanced gastric cancer) are seen as pain in the stomach area, which is often biting and not obviously related to eating, or similar to peptic ulcer pain, which can be relieved after eating. There are feeling of fullness and heaviness in the upper abdomen, anorexia, abdominal pain, nausea, vomiting, diarrhea, emaciation, anemia, edema, fever and so on. Cancer of cardia mainly manifests as discomfort, pain or retrosternal pain under the raphe, accompanied by obstruction of eating or difficulty in swallowing; cancer of gastric fundus and subcardia often has no obvious symptom, and it is not until the tumor is huge and necrosis and ulceration occurs to cause upper gastrointestinal tract bleeding that attention is drawn to it, or the infiltration of the tumor extends to cardia and causes difficulty in swallowing that attention is paid to it; cancer of gastric body takes distended type as the most common, and the pain and discomfort appear later; cancer of gastric sinus small curvature takes ulcerative type as the most common; cancer of gastric body takes ulcerative type as the most common. The ulcerative type of cancer is most common in the lesser curvature of the gastric sinus, so the symptom of epigastric pain appears earlier, and when the tumor extends to the pyloric opening, it can cause nausea, vomiting and other pyloric obstruction symptoms.