Persistent bloating is not necessarily due to stomach cancer, but may also be caused by eating factors such as unclean diet, so it is necessary to consult a doctor in time to clarify the cause of the disease. Gastric cancer is a malignant tumor caused by Helicobacter pylori infection, heredity and other factors. After the disease, gastric bloating can be caused by indigestion, which may be accompanied by epigastric discomfort, black stools, nausea and vomiting, etc. In addition, non-cancer factors can also cause gastric bloating. In addition, non-cancer factors can also lead to bloating, such as eating unclean diet, eating greasy food, eating too fast and other dietary factors; irregular lifestyle, mental stress; gastritis and so on can lead to symptoms of bloating. Therefore, it is necessary to consult a doctor in time after the discomfort occurs, to clarify the cause of the disease in order to treat the cause of the disease.