When a child has a cold and shows symptoms of vomiting, it is likely due to acute gastrointestinal symptoms. In this case, oral medications to protect the stomach, such as bifidobacterium, cimetidine, omeprazole, or other antiemetic drugs can be administered. Additionally, it is important to check if there are symptoms of tonsillitis or throat inflammation, as inflammation of the tonsils or throat can stimulate the gag reflex and also cause reflex vomiting. In this situation, the first step should be to control the symptoms of the throat and tonsils, which will gradually improve the vomiting. Also, pay attention to the child's body temperature and their mental responses.