Causes of stomach cancer: 1. The exact cause is still unknown. 2. Coastal dwellers beware. These places are more likely to be saline. 3. Eating extra salty foods , canned foods , artificially colored foods 4. Eat more grilled / fried fish , meat , kebabs etc. 5. Lack of nutrition in the body , vitamins A, E, C. Smoking , smoking , smoking 6. Alcohol 6. Genetic 9. Drink contaminated water , this water contains a special bacterium , name .. Helicobacter pylori 10. Accumulation of body fat 11. Fast food , junk food , eating more cold drinks 12. Gastric ulcer 13. And some factors , it is said , increase with age , men are more likely than women , blood group A positive, but these are not so important factor.