Swollen bicep/armpit area - any ideas?

I had it after my last COVID vaccination and it passed after a few days.. so sometimes it could be after an infection you had in that area

It sounds to me like it might be a swollen lymph node. But of course I'm not a doctor and it should be checked out. If you have the time check out your lymphatic system and some of the things you can do to keep it flowing properly.

It is not red or warm or painful, which is why I haven’t made an appointment yet. It has been swollen for some time though.

A few weeks ago the area behind my knee felt odd. I don’t know that it was noticeable swollen but it definitely felt different and tight. I too though maybe it was blood clot but it wasn’t. I tend to blame everything on inflammation lately. But I remember being really worried and everything turned out to be fine.

Does it feel warm in the area that you’re feeling this? I’d say make an appointment with your doctor to get checked out.