i was wondering if anyone of you had ever experienced this problem.when i was a kid in ukraine and didn't receive proper treatment for my cf and my health was really bad, i was suffering from extreme leg pain. either i couldn't bend my legs [thus not letting me walk, stand or even move] or my knees would get really sore and swollen, to the point where my mother would call the ambulance on a daily basis so that they'd give me a shot with very strong painkillers. when i moved to israel and got good cf treatment, my legs were fine. now as i am getting sicker, every time my lungs give me trouble, so do my legs - they are very sore [not muscle ache but more like having someone taking a chainsaw to my bones] and sometimes i almost cannot walk.i talked to my doctor about it and she said that having a lung inflammation can affect other areas of the body, and probably that is what's happening. did that ever to you?[and off-topic, where can i register for this board instead of being 'anonymous'?]==========================I'm a 20-year-old CF-er from Israelcurrent FEV1 - 61%