Most of the working people have some stomach diseases, but they often ignore them and take medicine to relieve the pain only when they have no choice, and they do not pay attention to their diet. However, these trivial things are often important factors triggering stomach cancer, so those who suffer from some stomach diseases must be treated early, and those who don’t must also develop good eating habits to prevent it early. For those who suffer from gastric cancer, they should pay attention and go to hospital as soon as possible for treatment. Early symptoms of gastric cancer are not obvious, and they often include unpredictable upper abdominal discomfort, vague pain, belching, acidity, loss of appetite, mild anemia and other symptoms similar to gastroduodenal ulcer or chronic gastritis. And some patients often just take painkillers, anti-ulcer drugs or diet modification to reduce or relieve pain, and do not go to the hospital for examination, and thus are often ignored without further examination. As the disease progresses, the symptoms of stomach gradually become obvious, such as epigastric pain, loss of appetite, emaciation, weight loss and anemia. At the later stage, there are often metastasis, abdominal mass, enlarged left supraclavicular lymph node, black stool, ascites and severe malnutrition. Since gastric cancer is extremely common and harmful in China, and the relevant studies believe that its causes are related to dietary habits and stomach diseases, it is very important to understand the basic knowledge about gastric cancer for its prevention and treatment. What are the common complications of gastric cancer? 1. When complicated with gastrointestinal bleeding, dizziness, palpitation, tarry stools and vomiting coffee-colored material may appear. 2.When abdominal metastasis of gastric cancer pressurizes the common bile duct, jaundice and clay-colored stool may appear. 3.Incorporated pyloric obstruction, vomiting, dilated gastric pattern in the upper abdomen, and vivid watery sound can be heard. 4.Carcinoma perforation causes diffuse peritonitis, and peritoneal irritation such as abdominal muscle plate stiffness and abdominal pressure pain can be seen. 5.Formation of gastrointestinal bile duct, see discharge of indigestible food. I hope readers can pay attention to gastric cancer, the prevalence of which has been increasing in recent years, so office workers, who are the high-risk group of gastric cancer, must do a good job in preventing and treating gastric cancer and develop good eating habits.