What should I do if I have a fever after getting vaccinated?

Patient's question:

Because there were no antibodies, I got the hepatitis B vaccine yesterday afternoon, and I had a slight fever in the middle of the night. What should I do if I have a fever after getting the vaccine?
Past treatment history and effectiveness: Physical cooling.
What kind of help do you need: The fever reached 38.8 degrees. Can I take 999 Children's Cold Relief?

Doctor's answer:

This parent suggests that you give your child more warm water to drink. You can take your child to the hospital for a check-up, including blood tests, to ensure thorough examination. If there is an infection, it is recommended to use anti-infective medications in coordination. Generally, children may experience a fever after vaccination. There is no need to be overly anxious; timely fever reduction is sufficient. If the high fever persists repeatedly, it is necessary to return to the hospital for follow-up treatment. I hope this is helpful to you.

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