If it's just under/behind the kneecap, it's probably a touch of patella(r)? tendonitis. It'll clear up soon if you keep your knees warm, avoid things like skids and sudden accelerations (especially from standing starts), and generally keep your cadence up around 90rpm - which might mean dropping your gear a bit. I've often got an extra tooth at the back in the winter. Not a wisdom tooth, mind.
Once it clears up, you can cautiously return to thrashing the shit out of it again :p
If it's just under/behind the kneecap, it's probably a touch of patella(r)? tendonitis. It'll clear up soon if you keep your knees warm, avoid things like skids and sudden accelerations (especially from standing starts), and generally keep your cadence up around 90rpm - which might mean dropping your gear a bit. I've often got an extra tooth at the back in the winter. Not a wisdom tooth, mind.
Once it clears up, you can cautiously return to thrashing the shit out of it again :p