According to the Mayo Clinic, the earliest sign of both noncancerous (benign) and cancerous (malignant) stomach tumors is microscopic internal bleeding, which is usually only detected by tests that check your stool for blood. You may also feel tired if this bleeding causes the loss of too many healthy red blood cells (anemia).
When the cancer is more advanced, you may experience signs and symptoms such as:
- Discomfort in the upper or middle region of your abdomen that may not be relieved by food or antacids. In the early stages of stomach cancer, pain is often masked by food or acid-buffering medications.
- Abdominal discomfort aggravated by eating.
- Black, tarry stools.
- The vomiting of blood.
- Vomiting after meals.
- Weakness, fatigue and weight loss.
- Full feeling after meals, even when eating less than normal.
Having one or more of these signs and symptoms doesn't necessarily mean you have stomach cancer. Other conditions, especially peptic ulcers, can cause similar problems.
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