What is the reason for fever after vomiting in infants?

Patient's question:

Patient Age: Two and a half years old
Detailed Condition and Purpose of Consultation: Vomiting occurred last night, followed by a fever. Is it possible that the child has indigestion? How should the medication be used?
Duration of the Current Illness: 3 days
Current General Condition: Vomiting has decreased, but the fever persists. Unsure how to use the medication.
Medical History: This type of symptom has never occurred before.

Doctor's answer:

It is recommended to have your child's blood tested for a complete blood count. This can help determine whether the infection is bacterial or viral, allowing for targeted treatment.
For low-grade fever, increasing fluid intake can help lower the temperature to normal. Generally, antipyretic medications are not recommended. However, if the temperature rises above 38.5°C, it is advisable to take antipyretic medication while continuing to drink more fluids. If an infection is present, it is necessary to take both antibiotics and antiviral medications, along with increased fluid intake. Wishing you a speedy recovery!