I am a veteran. I am 50% for ptsd and other condition. I had a knee replacement surgery in march 2015 now my knee is worst than before. I need a need a revision surgery. I want with a cane and I can't drive. I have a hard time during daily activities i.e getting dress and cleaning up house. I am not working and I work for post office. My leg hurts all the time and I only can bend it back 70% and forward 10%.