It happened somewhere on the last week of June this year.
A few days afterward a lump developed on the back of my (already problematic) left knee. It's now big enough (at least to me) that you will immediately spot it at first sight. It was originally dull and not (causing) painful, but now whenever I push it, I'll feel painful which I can't tell where exactly the pain is located. In addition, the lump's "base" is now giving me pain too. And more, that knee is swollen (not entire knee, just the top-left side of the knee, above the lump)... Oh and the lump is also locking my knee especially when bending - but I already have difficulty to completely bend that very knee though -- if full degrees is 100, then my knee stucks at about 70 degrees; I think I first NOTICEd it when I was in Form 4.
If the lump is Baker's cyst, what could be the underlying cause(s)?
And is the swollen knee part of that lump, caused by the lump, or some other type of knee pain?