Hello Doctors, My son born on 10th ARR-2016 and the 1st Vaccination done on 20th APR-2016 in his left but now we observed little swelling in his left hand with looking like inside PUSS (Bulging ) and looking as a yellowish color on his left hand. Please request you to suggest on this like is it normal or need to do any actions on the same. Thanks.

Because the BCG vaccine is injected just under the skin, side effects at the site of the injection are common. A lump will normally develop at the injection site (usually on the left upper outer arm). This can become ulcerated and may bleed, or ooze pus, requiring a dressing to be applied. A small permanent scar is normal (see below). Because BCG is a ?live? vaccine, it can cause all the same complications as TB, but much less commonly. Up to 1 in 50, though usually around 1 in 300, vaccine recipients get swollen and painful lymph nodes (glands) in the neck or armpit; if severe they occasionally become infected, leading to an abscess requiring surgical draining. 

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