Long-term breaks between meals increase appetite, which is accompanied with the release of gastric juices in the stomach before the food enters there. The released gastric juice interacts not with the food, but with a mucosa of the empty stomach, causing irritation that leads to the development of acute inflammatory processes.If the situations repeat continuously such processes may become chronic.
Stomach diseases may arise as a consequence of overloading the stomach with abundant food. Digestion of the excess amounts of food requires an increased activity of gastric juice, but since its supply is insufficient compared to the food amount, the digestion processes become delayed that results in incomplete digestion of foodstuffs.
Malnutrition exerts an extremely negative impact on the functional condition of the digestive system. For example, an insufficient supply of proteins often decreases the stomach secretion and deteriorates liver functions. Lack of vitamins in the diet also influences negatively.
Smoking. Harmful components of tobacco smoke (nicotine, ammonia, acids, resin, and others) irritate the oral mucosa and salivary glands that stimulates an increased salivation. Together with the saliva the components of tobacco smoke penetrate the stomach and irritate the gastric mucosa from inside. Irritation of the gastric mucosa, in turn, promotes the release of large amounts of gastric juice and gastric acidity increases significantly. These factors greatly increase the risk of peptic ulcer and gastritis. Moreover, smoking stimulates peristalsis of the intestine that may cause periodic constipation and diarrhea.
Infections and parasites. Infections and parasites (Salmonella, Staphylococcus, worms) penetrate into the organism through food (unwashed fruits or vegetables, the spoiled meat or sweets) and water and may cause fever, nausea, vomiting, pain and diarrhea and so on.
Medications. Virtually all drugs affect the condition of the gastric and intestinal mucosa to a certain degree. They may cause stomach or duodenum disorders or contribute to the aggravation of the existing problems.