What parts of the body will be uncomfortable after a baby receives the BCG vaccine?

Patient's question:

I don't know if he has this condition, and his mental state isn't good either. Could you please tell me what parts of the body might feel uncomfortable after a baby receives the BCG vaccine?

Doctor's answer:

Usually, about 3 weeks after vaccination, redness and swelling will appear at the injection site. The center gradually softens, forming small white pustules. When the pustules rupture, pus is discharged. It takes 1-2 weeks for crusting to form, and after healing, a circular scar may remain. The above process generally lasts for about 2 months. Vaccination with BCG can also commonly cause lymph node enlargement near the injection site, which is a normal response.

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