This is in the running for my dumbest post ever because I've clearly just psyched myself out on WebMD...but I have a really, really dark gnarly bruise on my knee, but not on an easily bumped knee cap—on the inner side/across the back. I generally don't bruise easily and have no memory of falling or hitting the back of my knee.
I've never had a bruise this dark and intense, either.
I'm a little worried I have some sort of lodged blood clot, and figured I'd crowd source before freaking out about my long-ish train and car ride tomorrow. Google images is turning up far too many results when I google leg clot.
I'm in my early 20s and healthy and have no reason to think I have a blood clot other than the back of my knee being black, and my 100% cheese diet (my blood is probably pudding texture, by now).