My right knee was a bit sore yesterday for no reason, just annoying. Woke up this morning and it was in no mood to bend!! I could walk just fine but it did not want to bend! Going up stairs was very painful, it hurt to sit down or even stand up! Took 2 Aleve and it is ok, for now! See what happens in the morning. It's a bitch to get old!! This is just something new.