Hi, I have ongoing sporadic pain in both knees, which often feels like a tightening type of pain and happens regardless of weather, exercise or lack of exercise. I have had it for the last 2 years now, but the pain has recently come up in both hips, forearms, shins and the back of my skull. My right knee has also started a sort of fluttering, not twitching but it feels as though something is flapping in my knee. Any ideas?