3) Abdominal Pain
As is to be expected, the presence of abdominal pain is quite frequent among patients with stomach cancer. Its location is usually located in the upper part of the abdomen, in an area called epigastrium, colloquially known as the mouth of the stomach. However, it is important to note that stomach tumors rarely ever cause pain or discomfort during the initial stages of the disease. As such, the appearance of abdominal pain should be taken as a serious development and a sign of high clinical significance, especially when it is accompanied by other symptoms found on this list.