Cancers of the stomach, pancreas, colon, and ovaries can put pressure on your stomach and make you feel overwhelmed when you eat.
Blood in the stool. Cancer can bleed, but so can bleeding from many other things, including wounds, hemorrhoids, infections, and wounds. When your stool looks red, the blood is usually somewhere in the gastrointestinal tract, which means the esophagus, stomach, and intestines.