Sore armpit after Pfizer booster?

[MsVillanelle]

Hello Mumsnetters,

Just wondering if anyone else has been suffering with this since having their booster jab? Having had my two AZ jabs earlier this year, I had Pfizer booster 2 days ago and since then my armpit (on the side I was jabbed on obviously) is sore and a bit swollen. I was anticipating the actual jab site to be a bit sore (which it is), but actually the armpit feeling is worse. I know this may be due to swollen lymph nodes etc, but am just a bit worried? Have had a few friends diagnosed with breast cancer over the last couple of years, so quite jumpy about it all. Has anyone else had this as the main side effect of the booster and if so, how long did the problem last for you? Need a bit of reassurance! Thanks in advance for any help or advice x

Forgot to say when the swelling was really bad an ice pack did give me some relief.

Swollen lymphs, in the armpit or (to a lesser extent) are both very common and actually can be a great sign—means your immune system is kicking into high gear.

I had three Pfizers, and each one of them made my underarm swell markedly. Interestingly, the booster was the least bad of the three.

I had this as well.

DD and I both had this. Lasted about a week.