2 years old, what is the treatment for vomiting and abdominal pain?

Patient's question:

Age
Detailed medical history and purpose of consultation: Vomiting for 3 days (even when eating porridge), accompanied by abdominal pain, no fever, runny nose, or cough. What could this be?
Duration of current illness: 3 days
Current general condition: Vomiting with abdominal pain, poor appetite, and low spirits
Medical history: None
Previous diagnoses and treatment history and effectiveness: Sore throat
Auxiliary tests: None
Other:

Doctor's answer:

Vomiting can be a physiological phenomenon, or it can be a pathological phenomenon, and it can even be an early sign of some serious conditions. Therefore, it is very important to promptly and correctly identify the cause of vomiting and take corresponding measures.
You should go to the hospital to see a pediatrician to check what the cause is, so that treatment can be provided.