When we have upper abdominal discomfort, we often go to pharmacies or convenient clinics to buy or prescribe some stomach medications, such as ranitidine, omeprazole and other drugs, and in many cases the stomach discomfort does relieve. Some people do not feel relieved with one kind of medicine and change another stomach medicine until they do not feel relieved with many medicines or have complications such as wasting and bleeding before they go for examination. However, most of the detected gastric cancer is in advanced stage. We give drugs such as omeprazole to patients with definite diagnosis of gastric cancer, and 80% of them have pain relief in two days. These drugs can lead to pseudo-healing of cancer ulcers, and some patients who do not know their condition even think they are well and do not want to have surgery, which further confirms that improper application of “good gastric drugs” can delay the diagnosis of gastric cancer. In a recent case, a 3CM ulcer in the lesser curvature of the stomach was seen by gastroscopy and gastric cancer was suspected, but the pathological result was an ulcer. After taking omeprazole orally, the stomach pain was relieved the next day. The patient was reluctant to have surgery and the family wanted to review the case after a month of medication, but we studied the gastric CT and gastroscopy carefully and highly suspected gastric cancer. The patient was mobilized for surgery and the resultant postoperative pathology was gastric cancer, fortunately the lesion was stage II. Last week, we prescribed three advanced gastric cancer surgeries, all of them had a history of buying their own gastric medication, and the youngest one was only 24 years old. In the face of advanced gastric cancer, our doctors spend more time and effort on surgery and patients’ families spend a lot of money, but the huge effort often reaps a low-quality short-term survival for the patients, an outcome that leaves both doctors and patients helpless. We can change this helplessness very easily, and that is to find abdominal discomfort and do gastroscopy early. Many people have misconceptions and misinformation about gastroscopy and colonoscopy. They think that such examinations are painful. In fact, most hospitals above the second level have painless gastroscopy and colonoscopy, in which the examinee goes to sleep under the induction of drugs and feels almost no obvious sensation. I myself have undergone many gastroscopies and colonoscopies without any painful memories. The misconception that painless examinations cannot be seen clearly is pure nonsense.