The submucosal bulge in the stomach is mostly seen in benign occupying lesions, malignant tumors of the stomach, vascular malformations and so on. 1. Benign space-occupying lesions: mostly seen in gastric polyps, gastric lipoma, gastric neurofibroma, etc., which often lead to tissue hyperplasia of gastric mucosa and gastric glands, so there will be a bulging phenomenon. 2. Malignant tumor of stomach: for example, gastric sinus cancer, gastric adenocarcinoma, gastric body cancer and so on, which may cause this phenomenon. 3. Vascular malformation: it may be vascular malformation occurring in the gastric mucosa area, and most of the clinical symptoms are not obvious. Submucosal bulge in the stomach often needs to cooperate with the doctor to do further examination and clarify which cause is caused by targeted treatment.