Stomach cancer is a very serious disease among stomach diseases, and there are many causes of stomach cancer, let’s take a look at what are the causes of stomach cancer? What are the causes of stomach cancer? Diet: foods with high calorie and high salt content, such as pickled, smoked, fried and mold, are recognized as important carcinogenic substances. Bad habits such as smoking and alcoholism, long-term staying up late and overdrawing physical strength can lead to stomach lesions and induce cancer. Heredity: Stomach cancer has a certain tendency to run in families, and people with family history of stomach cancer are more likely to develop stomach cancer. Environment: Pollution in public environment such as living and working causes some bacterial and fungal infections, especially Helicobacter pylori infection, which is very likely to induce gastric cancer. Stomach disorders: various acute and chronic gastritis, gastric ulcer, polyps and other stomach diseases will lead to stomach dysfunction, reduce the resistance to stomach cancer, develop malignant lesions and produce cancer. More than 80% of gastric cancer patients will experience pain in upper abdomen; about 1/3 of patients will experience stuffy stomach, epigastric discomfort, loss of appetite, indigestion, accompanied by acidity; 1/3 of patients may experience unexplained weight loss, emaciation and fatigue although they have no obvious digestive symptoms; some patients will show symptoms such as acidity, heartburn, nausea, vomiting, belching or black stool. Can gastric cancer be cured? Experts say that the effect of gastric cancer treatment has a lot to do with the early and late treatment time. According to statistics, the survival rate of early gastric cancer is over 97% in 3 years after surgery, over 90% in 5 years and over 60% in 10 years. Therefore, the earlier gastric cancer is detected, the shorter the treatment course, the higher the cure rate and survival rate, which is an important part of gastric cancer prevention and treatment. However, according to statistics, less than one-third of patients have their stomach cancer detected and diagnosed within three months, which means only a few patients can be treated in time in the early stage of stomach cancer, and most patients are already in the middle and late stage when they are detected, and the treatment effect is not ideal. So what are the early symptoms of stomach cancer? Although the early symptoms of gastric cancer are not obvious, they are still traceable. More than 80% of gastric cancer patients will feel pain in upper abdomen, about one-third of gastric cancer patients will have symptoms such as abdominal discomfort, stomach stuffiness, loss of appetite and acid reflux, etc. A few gastric cancer patients have no digestive system symptoms, but only unexplained wasting and weakness. Experts say that if there is no history of gastric disease but the above symptoms appear in the near future, one should be alert to the occurrence of gastric cancer and should have further examination in time.