Gastric polyp erosion 0.5 cm generally refers to gastric erosion with gastric polyp 0.5 cm, benign is generally not serious, if there is the possibility of malignant transformation is more serious. The symptoms of gastric erosion with gastric polyps need to be divided into cases, most of the gastric polyps are benign lesions and 0.5 cm polyps are not big, generally a better prognosis, through the endoscopic resection of a better prognosis. However, a small number of polyps can become highly cancerous, such as adenomatous polyps, which have the potential to turn into cancer, and these cases are more serious. Patients with gastric erosion with gastric polyps of 0.5 cm are advised to go to the hospital and ask the doctor to make a judgment based on their own condition, rather than making a blind judgment on their own.