Children’s nausea and vomiting may be caused by physiological factors, such as mental tension, anxiety, etc., or pathologic factors, such as zinc deficiency, indigestion, etc.. 1. Physiological factors: children due to certain factors caused by mental tension, anxiety, can cause children eat nausea and vomiting symptoms. 2. Pathological factors: (1) lack of zinc: zinc is the coenzyme of many digestive enzymes, if the lack of zinc, digestive enzymes reduce, resulting in reduced digestive function, the child will show the symptoms of nausea and vomiting when eating. (2) indigestion: children eat too much, more than its digestive function, will appear indigestion symptoms, such as nausea and want to vomit when eating. Children nausea and vomiting after eating may have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.