question: My husband has been having several pain from the back of his knee into his calf when walking and it is sever pain and starts to shake from the pain when he lays down. He has had Doppler scans they were good he has had X-ray no brakes or fractures and he had MRI only said small joint effusion and mild condromilatia of the troclia (? Spelling) these should not cause this much pain should they? What could be problem where do we go next.