Generally speaking, gastroscopy can assist in the detection of early gastric cancer, but at the same time, it needs to be combined with other examination means for determination. Gastroscopy can observe whether the color and blood vessels of the stomach have changed, thus assisting in determining whether the stomach has lesions, but at this time, it cannot determine whether stomach cancer has occurred, and it needs to be combined with CT examination, X-ray examination, etc., as well as based on pathological results to determine whether stomach cancer has occurred. In the early stage of stomach cancer, it is necessary to carry out active treatment in a timely manner, through surgery to remove the lesion area, so as to achieve certain therapeutic effect, and at the same time, carry out radiotherapy to kill cancer cells to a certain extent, so as to achieve the purpose of shrinking the lesion. After suffering from stomach cancer, it is recommended to go to professional hospitals for the next examination and treatment under the guidance of doctors.