Gastritis refers to the inflammation of gastric mucosa caused by various reasons, which is a common disease in clinic. The incidence of gastritis in stomach diseases accounts for more than 80%, so gastritis is one of the common diseases that endanger people's health. Because the stomach occupies an important position in the digestive tract, once the inflammatory changes occur in the gastric mucosa, a series of manifestations such as digestive dysfunction will inevitably occur.

According to the urgency of the disease, gastritis can generally be divided into two types: acute gastritis and chronic gastritis. Acute gastritis has an acute onset, usually several hours to several days after catching cold or improper diet and other physical and chemical factors. The onset of chronic gastritis is slow, and some patients don't even know their own onset time. The course of disease is usually several months or even years.