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.

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.

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.

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.

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