Although the exact causes of stomach cancer are unknown, certain risk factors are strongly correlated. The following lifestyle changes can reduce the likelihood of developing stomach cancer:

• Quit smoking. Smoking is a major risk factor for stomach cancer. Patients should ask their physician about smoking cessation programs and other methods to quit smoking.
  
  
• Limit alcohol. Too much alcohol consumption can cause chemical changes that may affect cancer cell growth.
  
  
• Improve diet. Patients should consume increased amounts of fresh fruits and vegetables as well as dietary fiber. Individuals should also reduce the consumption of red meats, especially those that are highly processed. Nitrates used for processing meats can contribute to the occurrence of stomach cancer. In addition, individuals should limit their intake of salty, smoked and pickled foods.
  
  
• Maintain healthy weight. Obesity is considered a risk factor for this disease. Maintaining a good weight also contributes to overall health.
  
  
• Avoid occupational and environmental toxins.  Exposure to coal dust, asbestos and nickel may increase the risk of stomach cancer.

Individuals should consult a physician if they have digestive symptoms such as nausea, vomiting, bloating, diarrhea, constipation or abdominal pain. While these may be caused may a number of less serious conditions, they may indicate ulcers caused by infection with H. pylori bacteria. Symptoms of ulcers should be addressed as they can be associated with stomach cancer.

Nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin, may lower the risk of stomach cancer as well as colorectal cancer, according to the American Cancer Society. However, these drugs can cause internal bleeding, interact dangerously with other drugs and result in other problems. They should not be taken regularly without a physician’s recommendation.