Signs and symptoms of stomach cancer may include: 
Trouble swallowing
Belly pain
Feeling bloated after eating
Feeling full after eating small amounts of food
Not feeling hungry when you would expect to be hungry
Heartburn
Indigestion
Nausea
Vomiting
Losing weight without trying
Feeling very tired
Stools that look black
 Stomach cancer doesn't always cause symptoms in its early stages. When they happen, symptoms might include indigestion and pain in the upper part of the belly. Symptoms might not happen until the cancer is advanced. Later stages of stomach cancer might cause symptoms such as feeling very tired, losing weight without trying, vomiting blood and having black stools. Stomach cancer that spreads to other parts of the body is called metastatic stomach cancer. It causes symptoms specific to where it spreads. For example, when cancer spreads to the lymph nodes it might cause lumps you can feel through the skin. Cancer that spreads to the liver might cause yellowing of the skin and whites of the eyes. If cancer spreads within the belly, it might cause fluid to fill the belly. The belly might look swollen.