Frequent vomiting does not necessarily lead to gastric cancer. Usually, gastric cancer has various symptoms and cannot be diagnosed from the vomiting symptoms, but the cause of vomiting needs to be confirmed from the patient’s medical history, clinical symptoms and relevant examination results. The most common examination is gastroscopy, which can also check whether there are signs of gastric cancer in the patient’s body. There are many reasons for vomiting, which may be caused by digestive and intestinal problems, not necessarily by stomach cancer. However, patients diagnosed with stomach cancer sometimes have symptoms of frequent vomiting, and after determining whether there is a lesion through gastroscopy, the patient is treated according to the results of the examination. If the patient does not have stomach cancer, treatment to stop vomiting is enough.