Improper dietary structure, Helicobacter pylori infection, irregular diet, taking medication, as well as long-term smoking and alcoholism can all lead to gastric diseases. If the diet structure is not proper, and you like to eat stimulating food, such as too cold, too hot food and spicy, irritating food, as well as fried food and pickled food, it will irritate the gastric mucosa. Pickled foods contain high levels of nitrites, which also increase the risk of cancer. Helicobacter pylori infection is one of the most important causes of gastritis and gastric ulcers, and if left untreated, it can become malignant and develop into gastric cancer. If the diet is irregular, often do not eat on time or overeating, will produce damage to the stomach. There are also taking drugs, if you take certain drugs for a long time, such as antibiotics, aspirin, etc., it will damage the function of the stomach. There are also long-term smoking and alcoholism. Smoking and alcohol will stimulate the gastric mucosa to secrete a large amount of gastric acid, which will affect the blood circulation of the stomach.