Active hyperplasia of gastric lymphoid tissue is the faster replication and proliferation of lymphoid tissue around the stomach, which may be due to inflammatory stimuli, injury, tumor, infection and other factors. Lymphoid tissue belongs to the body’s immune system, and when the stomach is irritated, the lymphoid tissue around the stomach can show active proliferation. Gastric lymphoid hyperplasia is a common response of the body to resist irritation and can be categorized as benign hyperplasia and malignant hyperplasia. The common factors of benign hyperplasia are inflammatory hyperplasia, such as chronic superficial gastritis, gastric lymphatic tissue can be hyperplasia active; infectious diseases, such as gastric Helicobacter pylori infection can have gastric lymphatic tissue hyperplasia active. Malignant hyperplasia is common in malignant tumors, such as gastric cancer, gastric lymphoid tissue can have very active hyperplasia. For patients with gastric lymphoid hyperplasia, it is necessary to actively cooperate with the doctor for examination to clarify the cause for further treatment.