There are many reasons for vomiting after eating, the more common are the following: first, diet, especially when eating spicy, stimulating, too cold food, will cause irritation of the mucosa, resulting in nausea and vomiting symptoms after eating; second, the stomach mucosa lesions, such as inflammation of the stomach, erosion, ulcers, etc., the mucosa itself has damage, after eating will cause irritation of the mucosa, resulting in nausea and vomiting symptoms; third, various causes of edema, narrowing of the pylorus of the stomach, or even obstruction, will lead to nausea and vomiting symptoms after eating; fourth, if a woman, should also exclude pregnancy reactions.