What are the symptoms of early gastric cancer? How to detect stomach cancer early? It is important to understand the corresponding symptoms and manifestations. Men over 50 years old who suffer from gastric disease should be alerted and have relevant special examinations as early as possible if they have recurrent epigastric pain in the near future, but it is good and bad at times. Nearly half of early gastric cancer patients have no clinical symptoms, and only some of them have mild indigestion and other symptoms, such as hidden pain and discomfort in the upper abdomen, slight fullness, pain, nausea, belching, etc. These symptoms are not unique to gastric cancer, but can be seen in chronic gastritis, ulcer disease, functional dyspepsia, and even normal people occasionally, therefore, many early gastric cancer patients do not have special clinical symptoms, so early gastric cancer is easy to delay diagnosis and treatment. 1.More than 80% of patients with early gastric cancer have upper abdominal pain. 2.About 1/3 of early gastric cancer patients have stuffy stomach, epigastric discomfort, loss of appetite, indigestion, accompanied by panic acid. 3.Although 1/3 of early gastric cancer patients have no obvious digestive symptoms, they may have unexplained weight loss, emaciation and fatigue. 4.Some patients with early gastric cancer show symptoms such as panic acid, heartburn, nausea, vomiting, belching or black stool. The more common symptoms of early gastric cancer are upper abdominal discomfort, such as mild stomach pain, swelling and heaviness, and sometimes vague pain in the heart fossa, which may be temporarily relieved if early gastric cancer is diagnosed as gastritis or ulcer disease and treated at first. If the lesion occurs in the gastric sinus, it may change the function of duodenum and cause rhythmic pain, which is similar to the symptoms of ulcer disease, and may be misdiagnosed as duodenal ulcer and delay treatment. However, all these symptoms of early gastric cancer will recur after a period of time. Therefore, anyone who has symptoms of upper abdominal discomfort, accompanied by other high-risk factors or recurring after treatment must be alerted to early gastric cancer and undergo further examination in order to detect early gastric cancer and treat it early. Indigestion symptoms such as loss of appetite, anorexia, nausea and vomiting, bloating after eating, belching and acid reflux are also a group of common but non-specific early signs of gastric cancer. Loss of appetite may be an early symptom of gastric cancer, and it is not accompanied by stomach pain, especially if it occurs together with stomach pain and hepatitis can be excluded. Some patients with early gastric cancer automatically restrict their daily diet because of bloating and belching after eating, resulting in weight loss, emaciation and weakness. Early symptoms of gastric cancer may also include feeling of fullness after eating and mild nausea. Early gastric cancer pancreatic tumor may start to appear as eating disorder and gradually develop into swallowing difficulty and food reflux. Early gastric cancer sinus cancer may develop further to vomiting due to pyloric obstruction. The above symptoms may be misdiagnosed as functional dyspepsia, so early medical consultation and gastroscopy should be conducted to detect gastric cancer at an early stage. Both early gastric cancer and progressive gastric cancer can present with upper gastrointestinal bleeding, often in black stool. A small number of early gastric cancers may show mild upper gastrointestinal bleeding symptoms, i.e. black stool or persistent positive occult blood in stool. It is mostly seen in polyp-like and ulcer-like early gastric cancer, which is caused by surface erosion of the lesion or invasion of capillaries by the cancer, resulting in long-term small amount of bleeding. It is not easily controlled by drug therapy. Any elderly people without stomach diseases should be more alert to the possibility of stomach cancer once black stool appears. If the stool is tarry and the stool occult blood test is persistently positive, especially when it is not easily stopped even after general diet control or gastric medicine, it is one of the important early gastric cancer symptoms. Therefore, those who have such symptoms should go to qualified hospitals for gastroscopy and upper gastrointestinal tract barium meal X-ray in time to clearly diagnose early gastric cancer. Unexplained emaciation, weakness and mental discomfort are also common but unspecific signs of gastric cancer, and they are progressively getting worse. Some of them are secondary to indigestion symptoms, and patients automatically restrict their daily diet due to bloating and belching after eating, resulting in weight loss and lethargy. In addition, nausea and vomiting can further lose nutrition and cause malnutrition, which will aggravate the symptoms of wasting and weakness. Of course, in the late stage of progressive gastric cancer, the wasting and weakness will be more obvious. In addition, it is especially worth mentioning that pathologically most gastric cancers occur on the basis of chronic gastritis (especially atrophic gastritis), Helicobacter pylori (HP) infection, residual gastritis, gastric polyps, gastric ulcer, etc. Therefore, some patients have a long-term history of chronic gastric disease with symptoms such as epigastric discomfort and indigestion. On this basis, if the nature of pain, epigastric fullness, etc. has changed or the degree has increased recently, the rhythm of pain related to diet has changed, or cannot be relieved after taking medicine, or there is wasting and weakness, then it is more important to be alert to the occurrence of gastric cancer. Most of the gastric cancer patients with wasting and weakness are in the progressive stage of gastric cancer, and most of them have local or distant metastasis, and often have anemia. Besides gastric cancer, a variety of causes can cause vomiting, such as common duodenal bulb ulcer or post-ulcerative scar stenosis, reflux esophagitis, pancreatic ulcer, etc. Cardia or gastric cancer involving the pylorus often causes vomiting, which can include decaying food, gastric juice or even coffee-like bloody fluid. Vomiting is usually a clinical manifestation of progressive gastric cancer and is often accompanied by weight loss. The painless, hard and fixed swollen lymph nodes like soybean or peanut on the left clavicle of gastric cancer patients are more specific signs of gastric cancer, which are mostly signs of progressive gastric cancer with metastasis to abdominal cavity and other organs, and are no longer early gastric cancer. Once a patient with gastric cancer finds enlarged left supraclavicular lymph nodes, he/she should immediately undergo lymph node biopsy or cytological puncture; gastroscopy and biopsy of gastric cancer lesions in multiple pieces and directions should be taken for pathological examination, supplemented by barium meal X-ray of stomach if necessary, which can make clear diagnosis immediately. Early gastric cancer is especially easy to be misdiagnosed or missed because there are no special specific symptoms. For people with high risk of gastric cancer, timely gastroscopy should be performed to detect and confirm the diagnosis at the early stage of gastric cancer in order to ensure the prognosis.