Saturn rules the joints, especially the knees. Transit Saturn is not making any difficult aspects, in fact is in a trine to Ven, ruler of your 6th house, indicating stability. Along with that, Jup is also going through your 6th house, conj Mer. Prog Moon is in Cap now, over your first house, so all health issues that have to do with bones, joints and teeth are in focus.
I would like to add just as a precautionary measure that everything that has to do with travel, even movement, you need to be careful about at least for a year. If there are cuts, bruises or pains, you should get them checked up, so no infection develops. Besides the fact that Pluto over your first house is activating all the oppositions to your Ven (ruler of your 6th house), prog Mars (falls and accidents) is in the 3rd house (movement) and is applying in a square to Mer (planet of movement), which sits in the 6th house of sickness. The good thing is that natally your Mercury is no major poor aspect. Mer also rules your house of travel.
In Feb of 2010, progressed Moon had just entered Sag (sign of movement, besides Gem), and into your 12th house. This could mean that you were cut off from the world for some time, forced to retreat, maybe hospitalised? Prog Mars was on the tip of your 3rd house. Knees are ruled by Sat, and you were having Sat square Sat. Transit Sat Further, your Mer in the 6th was hit by several planets transiting your 3rd house, Jupiter (overdoing things, carelessness) and Uranus. Uranus (sudden) aspecting Mer (movement) and/or Mars (falls, accidents) is a always a time to watch out.
Lots of good health