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BCG vaccine, bump

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Posted on Mon, 21 May 2012
Question: Baby got a puncture on her BCG vaccine bump
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Answered by Dr. Raju A.T (1 hour later)
Hi XXXXXXX

Thanks for your query,

In would consider it normal if the pustule formed at the injection site has broken/ opened.

Normally a bluish-red pustule is formed within 2-3 weeks after vaccination. After approximately 6 weeks, the pustule ulcerates/breaks, forming a lesion approximately 5 or 6 mm in diameter and drain pus like fluid for few days and ultimately form granulation tissue ( pink tissue with abundant blood vessels and fibrous tissue ) and cover the wound with a scab which falls off after few weeks leaving a scar. BCG vaccination generally results in a permanent scar at the puncture site.

There will be no need for any treatment for the same , as it is self limiting.Also do not try any topical antibacterial creams as they will have no response.Just keep the would clean and dry with a bandage if needed.

Hope I have answered your query. If you have any follow up queries I will be available to answer them.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Dr. Raju A.T

General & Family Physician

Practicing since :2008

Answered : 4168 Questions

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BCG vaccine, bump

Hi XXXXXXX

Thanks for your query,

In would consider it normal if the pustule formed at the injection site has broken/ opened.

Normally a bluish-red pustule is formed within 2-3 weeks after vaccination. After approximately 6 weeks, the pustule ulcerates/breaks, forming a lesion approximately 5 or 6 mm in diameter and drain pus like fluid for few days and ultimately form granulation tissue ( pink tissue with abundant blood vessels and fibrous tissue ) and cover the wound with a scab which falls off after few weeks leaving a scar. BCG vaccination generally results in a permanent scar at the puncture site.

There will be no need for any treatment for the same , as it is self limiting.Also do not try any topical antibacterial creams as they will have no response.Just keep the would clean and dry with a bandage if needed.

Hope I have answered your query. If you have any follow up queries I will be available to answer them.