Congestion of the gastric mucosa indicates the presence of gastritis, which is associated with food irritation, drug irritation, and Helicobacter pylori infection. The gastric mucosa should have certain folds and a large amount of mucus to protect the stomach wall. Once there is congestion on the gastric mucosa, it indicates that inflammation occurs on the gastric mucosa, and this phenomenon is most common especially in patients with gastritis. Some people like to eat spicy, stimulating food in their daily diet, such as chili peppers, cold drinks, strong alcohol. This kind of food will cause stimulation to the gastric mucosa, thus inducing congestion and edema on the surface of the mucosa. After entering the stomach, some drugs will directly damage the epithelial cells of the gastric mucosa, and lead to a decrease in gastric mucosal synthesis, thus inducing gastric mucosal congestion, such as aspirin, prednisone and so on. When the stomach is infected by Helicobacter pylori, the Helicobacter pylori bacteria in the process of reproduction, will metabolize the toxic substances on the gastric mucosa caused by stimulation, which will also appear in the gastric mucosa congestion.