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Children's Vaccines Health Center

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Immunizations - When to Call a Doctor

Call 911 or other emergency services if you or your child develops any of the following symptoms:

Call your doctor if:

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  • Redness and swelling at the site of the shot (injection) last longer than 48 hours.
  • Your child is 3 months of age or younger and has a fever of 100.4°F (38°C) or higher.
  • A fever lasts longer than 48 hours after receiving a shot.
  • Any unusual reaction occurs.

If a fever develops after an immunization and you need to find out if you should call your doctor, see:

Talk with your doctor about whether you need special immunizations because you:

  • Are in close contact with people who have an infectious disease.
  • Have planned international travel, especially to developing countries.
  • Live with or visit a pregnant woman or baby.
  • Live with someone who has an impaired immune system.

    WebMD Medical Reference from Healthwise

    Last Updated: April 01, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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