Vomiting after eating can be caused by pregnancy, acute gastroenteritis or intestinal obstruction. 1. Pregnancy: If a woman of the right age experiences vomiting in the morning or after eating, is sensitive to greasy food and regurgitation, and has recently had sexual intercourse, delayed menstruation, etc., it should be highly suspected that she is pregnant, and there is a pregnancy. 2. Acute gastroenteritis: when patients eat unclean food may cause microbial infection will appear after eating nausea and vomiting, accompanied by fever, abdominal distension, abdominal pain and other conditions, at this time should be quickly to the hospital for treatment. 3. Intestinal obstruction: When the patient has intestinal obstruction, the peristaltic ability of the intestines is weakened, and the gastrointestinal food cannot be fully digested, which will cause vomiting immediately after meals. This kind of situation may also be caused by other reasons, it is recommended that patients go to the hospital as soon as possible to identify the cause of the disease, and then targeted treatment.