Final answer:
Stomach ulcers form due to the breakdown of the protective mucus lining, often caused by an infection or excessive NSAID use. Prevention includes avoiding damaging substances and managing stress.
Step-by-step explanation:
Formation and Prevention of Stomach Ulcers
Stomach ulcers, also known as peptic ulcers, are open wounds that develop in the stomach lining when the protective mucus layer is compromised. This can be caused by an infection with Helicobacter pylori bacteria, or by excessive use of non-steroidal anti-inflammatory drugs (NSAIDs), such as aspirin. Lifestyle factors like smoking, stress, and consumption of certain foods and beverages can also contribute to ulcer formation by damaging the mucus that safeguards the stomach lining. To prevent stomach ulcers, it is important to maintain a healthy mucus barrier by avoiding these detrimental habits and foods, and possibly by managing stress levels to minimize the risk of increased stomach acid production.