What is the reason for the two-year-old baby's recent frequent nausea and vomiting?

Patient's question:

Patient Age: Two years old
Detailed Condition and Purpose of Consultation: My baby is two years old. Recently, he has frequently experienced nausea and vomiting, with no other abnormal symptoms found. What could be the cause?

Doctor's answer:

Based on the symptoms described above, it is possible to have indigestion or pediatric gastritis, which is related to eating. Symptomatic treatment with digestive aids can be considered.
Recommendations:
Maintain a positive mood.
Get adequate rest, avoid fatigue, reduce late-night outings, and balance work and rest.
Pay attention to dietary adjustments, focusing on light and easily digestible foods.
Limit consumption of sweet, sour, spicy, and cold foods.
Avoid fast-food options such as KFC and McDonald's.