The general term of all stomach diseases is gastropathy. Gastropathy includes all the diseases that may affect all stomach parts. Clinical and laboratory data shows that most of the stomach diseases are caused by the infections. Initially it was considered that stomach acid prevents the spread of the microorganism in the gastrointestinal tract. However, this statement is right only for some bacteria. Clinical studies shows that in most cases stomach infections are associated with Helicobacter pylori. This bacteria is able to survive in the stomach acid due to its ability to metabolize urea into carbon dioxide and ammonia via activating the enzymes called urease. These compounds neutralize stomach acid and prevents its digestion.

The most widespread stomach diseases include:

• Dyspepsia or indigestion is a condition manifested in pain in the stomach, the sense of stomach fullness, nausea, heartburn, bloating, belching.
• Abdominal pain is usually associated with one or more diseases of the organs located in the abdominal cavity.
• Peptic ulcer is a stomach disease that is related to the colonization of Helicobacter pylori. The patients complain on the stomach pain, dyspepsia, loss of appetite, bloating, nausea. Some patients may experience stomach bleeding
• Achlorhydria and hypochlorhydria are conditions when a stomach do not produce and produce insufficient stomach acid.
• Stomach cancer. It's a very widespread disease that is manifested in the malignant tumours in the stomach. The scientists consider that the stomach cancer is related to the Helicobacter pylori, genetic hereditary factors, infections and medicines.
• Zollinger-Ellison syndrome is a diseases that occurs when a level of gastric is too high. This causes stomach to produce more stomach acid.
• Gastroesophageal reflux disease (GERD) is defined as chronic symptoms that are caused by the abnormal reflux of the stomach acid into the esophagus.