Following a long, hilly run I have a knee injury I have not experienced before.
The pain is on the centre/top of the knee cap. which is very tender to the touch. There also seems to be a small lump which can be compressed and moved with the finger. I have rested for over a week with no real improvement. It is not painful when I walk...have not tried running on it again yet.
I think the injury resulted from a steep downhill strectch at the end of the run.