Stomach cancer is rising, especially in Asia, but early symptoms are often mistaken for ordinary digestive issues. Many patients “dismiss the signs, believing it’s just gastritis or indigestion—until the pain becomes unbearable.” Detecting it early is crucial.

One of the first signs is “vague, persistent abdominal discomfort.” About 70% of early-stage patients feel bloated, full, or slightly painful after meals or when lying down. Frequent heartburn or acid reflux—“a burning sensation after eating”—can also indicate early damage to the stomach lining.

Loss of appetite and disinterest in food may signal chronic inflammation or abnormal cells. People may feel full quickly or “lose interest in food altogether.” Unusual changes in stool appearance, including signs of internal bleeding, are subtle but important warnings.

Unexplained weight loss is another red flag, as stomach cancer can suppress appetite and interfere with nutrient absorption. Constant fatigue or weakness is common since “cancer cells can weaken your body over time.”

Finally, experiencing nausea or vomiting blood is a serious warning. “If this occurs—even just once—seek immediate medical attention,” as it may indicate advanced stomach cancer. Early detection improves treatment outcomes, so paying attention to these signs is vital.