Medical Q&As

Vaccination - swelling in armpit?

Last week I received vaccines for hepatitis A and B and boosters for tetanus and polio. In the last 3 days I've noticed a lump under my left arm, which is a little sore. There is no redness on the skin. Is this something related to the jabs? Should I wait & see if it clears up itself?

This sounds like a swelling in the axillary lymph glands. Presumably the vaccines were injected into your shoulder, which triggered the reaction in the local glands. This is a relatively common reaction to vaccination and usually does not require any attention. The reaction is likely to subside over the coming days. However, if the swelling increases or if the area becomes more uncomfortable you should return to the doctor that administered the vaccines for further advice.