I fell over in the summer, in the process bashing my left knee on tree stump / root? I don't actually remember. I hurt myself enough that I wasn't able to get up immediately. I had to walk 3 miles to pushy then cycle 8.5 miles home.
My knee appears to be fine when running except when running downhill and that isn't consistant. I had a week out in the summer and forgot that I had hurt my knee afterward. Had no pain or discomfort for several weeks. However, I cycle commute and a couple of weeks of high mileage running and cycling and my knee started to hurt again in the same way. Swimming breaststroke will also aggravate it.
I can't really quantify or identify the pain. If I kneel or knock my knee it will hurt. If I straighten my leg after sitting for a while it will hurt but then not. It doesn't hurt day to day, running doesn't hurt it, doing too much cycling can but yesterday I did a 10 mile sprint and didn't notice it.
It seems to be related to getting a little stiff or tired and mostly moving in a sideways motion. ( I can't side step for example). Bit difficult to identify and work out what hurts as I can't induce pain, it'll hurt once then not again even if I do the same thing.
For the most part it doesn't hurt unless I knock my knee or do too much. I can be no more specific about the pain than that, it's not behind the knee and not above the knee but anywhere in a u shape around the knee.
Any ideas or anything I can do?