Stomach cancer, also known as gastric cancer, occurs when abnormal cells grow in the lining of the stomach. This type of cancer can develop slowly over many years and may not show symptoms in its early stages. Common signs include persistent stomach pain, difficulty swallowing, and unexplained weight loss. Risk factors for stomach cancer include a diet high in salty or smoked foods, smoking, and certain infections like Helicobacter pylori. Early detection is crucial for better treatment outcomes, so it's important to consult a healthcare professional if you experience concerning symptoms.