My mother suffers from arthritis. Main joint affected is knee. She takes lot of medicines daily but still suffers lot of pain daily. Please tell what to do. Doctors say there is no cure. I do not know why. It will be helpful if you tell.(1) Please tell a proper diet plan to follow and things to avoid. And please tell every thing she can eat so that she does not feel bore with same food daily.(2) Please also tell how can diet help.(3) She also goes for physiotherapy who claims will cure her disease.(4) What more can be done other than a good diet, please tell.(5) Once doctor gave her a injection in her knee to take out liquid from knee. Please tell what is that for.(6) PLEASE HELP.