Gastric angle mucosal lesions mean that the gastric mucosa has been damaged, the surface of gastric mucosa is incomplete, and there are polyps, erosion, ulcers, heterogeneous hyperplasia and carcinoma. 1. Polyps: polypoid lesions occur in the mucosa of the gastric angle, most of the gastric polyps have no obvious symptoms, but if the size of the polyps is large, nausea, abdominal distension, loss of appetite and other symptoms may occur. 2. Erosion, ulceration: the gastric angle mucosa is lesions, may appear congestion, erosion, ulceration, point or piece of bleeding, known as erosive gastritis, gastric ulcer. 3. Heterogeneous hyperplasia: prolonged damage of gastric angle mucosa may progress into heterogeneous hyperplasia, which is also known as intraepithelial neoplasia. 4. Carcinoma: lesions of gastric angle mucosa may induce gastric cancer, accompanied by abdominal distension, nausea, loss of appetite and other symptoms. It is recommended to consult doctor in time and follow the doctor’s instruction to avoid delaying the condition.