My knee aches. You know how I often write about the many hills to be run in this area? How steep they are? How many ups we do on a weekend morning? Well, they all go back down eventually, and that can be hell on one's knees. Couple that with races on two consecutive weekends and a little more mileage than usual, and you can develop tenderness and a little inflammation of the patellar tendon, which connects the kneecap to the, umm, fribula. The one in front there. The shin, yeah.
It only hurts when I keep it bent for a long time -- for instance, during an hour-long drive or sitting at a desk for eight hours. Fortunately I only do each of those things once a day (well, twice, the driving). For my lay readers, I have prepared a diagram that will illustrate the condition.
Don't be alarmed: this is a fairly common syndrome and I expect a full recovery. Although your concern is appreciated. (PS: I'm still running, because it only hurts after.)