Is vomiting due to overeating, accumulation of undigested food, or catching a cold?

Patient's question:

November 5th

Doctor's answer:

Analysis of the condition: Hello, it is generally considered related to an unsuitable diet. Have you previously eaten any indigestible foods?
Recommendations: It is recommended to wait and see, taking lactase and vitamin B6 to observe the situation. If the child's condition is not related to diet, it cannot be ruled out whether it is due to a cold. Consider taking children's Zhibao Ding to alleviate the symptoms.
Aftercare: It is recommended to pay attention to diet, eat less indigestible foods, and avoid cold and greasy foods.