swelling behind knee

[thesonicoscillator]

Hello, I do quite a lot of exercise involving knees and have this swelling behind my right knee. Last week my knee briefly locked up too. Any idea what it could be? Right now I've got ice on it & putting anti inflammatory gel on it too . I think the rest of my leg is feeling not quite right too. It's not red and is soft to touch. I am trying to get a Dr's appointment asap. My gut says Baker's Cyst which I'm so scared of rupturing 😢

Bakers Cyst, a physio sorted mine.

Definitely looks like a Baker’s cyst, possibly developed due to a cartilage injury which it sounds like you might have, with the other symptoms. I’ve had mine for 10 years now and it’s never given me any trouble, so rupture isn’t inevitable. I would think that it’s worth seeing a physio, as PP suggested, as you might need some help with the injury that’s caused it, too.