Long-term nausea and vomiting may not necessarily be stomach cancer. There are many causes of long-term nausea and vomiting, such as chronic gastritis, but the possibility of stomach cancer cannot be excluded. Most patients with early gastric cancer have no obvious symptoms, while a few have nausea, vomiting or upper gastrointestinal symptoms similar to ulcer disease. As the tumor grows, more obvious symptoms will appear when it affects gastric function, such as increased abdominal pain, decreased appetite, weakness, fullness after eating, etc., but they lack specificity and are difficult to attract sufficient attention. Besides gastric cancer, chronic gastritis, dyspepsia and other diseases can also cause this symptom. Therefore, patients should not be overly nervous after experiencing long-term nausea and dry vomiting, but should go to relevant departments such as gastroenterology department for examination to clarify the condition. Patients are advised to pay attention to the care of the stomach, eat reasonably and avoid overeating in life. After the disease is determined, medications should be taken on time as prescribed by the doctor to avoid abusing drugs to damage the function of the stomach.