Suggest Treatment For Severe Body Pain And Left Knee Pain

Hi, My mother is having seviour body pains, and unable to walk as well. She has left knee pain from past 8 months and neck pain for about 3 - 4 months. A week ago after travelling by car for about 5 hrs, she got full body pains. When consulted a doctor, asked us to take x-ray for left knee and told that everything is fine with the knee. We consulted another doctor who suggested to take x-ray for neck, and told that there is no problem there as well. She is 64 yesterday and very much in depression... Please help!

Thanks in advance,
Louis