Gastric polyps, gastric smooth muscle tumors, gastric cancer and other diseases may be caused by about 1.2 cm mucosal elevated lesions in the fundus of the stomach, which need to be treated under the guidance of the doctor, such as medication, surgery and other targeted treatments. 1. Gastric polyps: endoscopic resection can be carried out, if accompanied by Helicobacter pylori infection patients need to take quadruple therapy, such as omeprazole, bismuth potassium citrate combined with amoxicillin, metronidazole and other drug therapy. 2. Gastric smooth muscle tumor: for 1.2cm gastric smooth muscle tumor, if it is single and has tip, it can be resected endoscopically; if it is multiple and without tip or accompanied by bleeding and other symptoms, it needs to be resected laparoscopically or by open surgery. 3. Gastric cancer: Early gastric cancer requires surgical resection, and progressive gastric cancer requires adjuvant radiotherapy in addition to surgical treatment. It is recommended to go to the hospital when there is a mucosal elevated lesion of about 1.2 cm in the fundus of the stomach, so as to ask the doctor to make judgment and clarify the cause of the disease.