First, you might consider visiting a doctor that can confirm the swelling you report in the feet and hands. If swelling is indeed present, you will need to perform some laboratory analyses to confirm or exclude malfunction of the kidney(s): standard blood/urine analyses(Er, Gr, Ly, Tr, Hgb, sedimentation, urinary sediment, urinary proteins etc.) plus proteins (albumins), urea and creatinin in blood. Conversely, the pain you are experiencing may be caused by arthritis or spondylotic changes of the vertebral column. Therefore, you can follow the standard analyses with x-ray images of the hands, feet, and spine.