Suggest Treatment For Lower Back Pain And Involuntary Movements In Legs

I have lower back pain and both my legs shake whilst the pain is high. I have had this condition for 9 years, always told nothing can be done for me. My legs stop shaking when my pain levels drop, when pain increases both egs will shake and also go very heavy so i have to sort of ski to walk. Shaking and high pain events last 2 to 3 weeks normally.