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A pink paper cut out of a stomach on a white background. It has a green spot on it to indicate a cancer tumor.

10 Signs and Symptoms of Stomach Cancer

How to Spot Stomach Cancer

Below are ten signs and symptoms of stomach cancer. Early detection is key for seeking proper treatment.

1. Persistent Indigestion



Chronic indigestion or dyspepsia that doesn’t resolve with over-the-counter medications can be an early sign of stomach cancer. Unlike typical heartburn, this discomfort may be accompanied by bloating and a sense of fullness after eating small amounts. This symptom is usually observed in the early stages of the disease but is often mistaken for less serious conditions like acid reflux.

2. Loss of Appetite

A noticeable and sustained decrease in appetite is another early indicator of stomach cancer. Patients may feel full after eating only a small portion of food or lose interest in meals altogether. This symptom often appears in the early to middle stages of cancer and can lead to unintentional weight loss over time.

3. Unexplained Weight Loss

Losing weight without making changes to diet or exercise routines can be alarming and is a potential symptom of stomach cancer. This weight loss typically occurs in the middle to advanced stages of the disease when the tumor begins to interfere with the body’s ability to absorb nutrients or causes metabolic changes.

4. Abdominal Pain or Discomfort

Pain or discomfort in the stomach area that persists or worsens over time may signal stomach cancer. This can range from a dull ache to sharp, stabbing pain, depending on the tumor's location. Abdominal pain is usually more noticeable in the middle to advanced stages of the disease, as tumors grow larger or spread.

5. Nausea and Vomiting

Persistent nausea and episodes of vomiting, particularly if the vomit contains blood or resembles coffee grounds, are significant warning signs. Blood in vomit suggests internal bleeding, which typically occurs in the middle to advanced stages of stomach cancer. Patients should seek immediate medical attention if they notice this symptom.

6. Feeling Full Quickly

Also known as early satiety, this symptom involves feeling full after consuming very little food. It is often caused by a tumor in the stomach that reduces its capacity or interferes with digestion. Early satiety is commonly observed in the middle stages of stomach cancer and can lead to malnutrition if left untreated.

7. Fatigue and Weakness

As stomach cancer progresses, patients may experience persistent fatigue and weakness. This is often due to anemia caused by internal bleeding or poor nutrient absorption. Fatigue can manifest at any stage but becomes more pronounced in the advanced stages when the body struggles to maintain energy levels.

8. Blood in Stool

The presence of blood in stool, which may appear dark and tarry, is a concerning symptom of stomach cancer. It indicates internal bleeding, which often occurs in the middle to advanced stages of the disease. Patients who notice this symptom should consult a doctor immediately for diagnostic tests.

9. Swelling or Fluid Buildup in the Abdomen

Known as ascites, the buildup of fluid in the abdominal cavity is a late-stage symptom of stomach cancer. This swelling may cause discomfort, difficulty breathing and a sensation of tightness in the abdomen. Ascites often occurs when cancer has spread to the peritoneum or other nearby organs.

10. Difficulty Swallowing

If the cancer is located near the upper portion of the stomach or has spread to the esophagus, patients may experience difficulty swallowing, also known as dysphagia. This symptom typically emerges in the later stages of the disease when tumors obstruct the passage of food and liquids.

Understanding the Progression

Stomach cancer symptoms can vary significantly depending on the stage of the disease. In its early stages, signs such as persistent indigestion, loss of appetite and feeling full quickly may be subtle and easy to overlook. As the cancer progresses to middle stages, symptoms like unexplained weight loss, nausea and abdominal pain become more pronounced. Advanced stages often bring more severe issues, including blood in vomit or stool, fatigue and ascites.

When to Seek Medical Attention

Early detection of stomach cancer dramatically improves treatment outcomes. It's essential to consult a healthcare professional if you experience any of these symptoms persistently or notice a combination of them. Diagnostic tools like endoscopy, imaging scans and biopsies can confirm the presence of stomach cancer and determine its stage.

While these symptoms are not always indicative of stomach cancer, being vigilant about changes in your health can make a significant difference. Regular screenings and prompt medical attention are vital, especially for individuals with risk factors such as a family history of stomach cancer, Helicobacter pylori infection or a diet high in salty and processed foods.