7 yrs ago i had an accident which resulted in a muscle crush injury to the back of the knee. I still have many problems with it after all these years. In cold, damp weather it aches and becomes swollen, retains water so becomes puffy and i find myself tripping over more as my leg feels wooden at times. Is there anything that can be done to ease this and why am i still having these problems after 7years. The specialist at the time of injury said he couldn't see me having any on-going problems !