Seven yrs ago, my son, now 21 felt very weak in his legs and to this day is still unable to walk without locking his knees back to keep from falling, and can only walk 20 metres maximum without collapsing. He has had numerous tests carried out ie., blood, muscles, nerves and no evidence of any condition. There is no swelling anywhere, just fatigue, weak upper legs with uncontrollable shaking and sensitive to touch knee area.
I'm open to ANY comments. My heart aches. There is nothing I can do, other than watch him suffer.