<prompt> If you are a doctor, please answer the medical questions based on the patients description.hello DR . TODAY when I had got out of bed I was fine , later on in the day my lower back left side became so painful that it is just about impossible for me to walk or bend ! at first I had thought it was one of my kidney s being diabetic !! also I had thought siadic nerve but it is just painful where the back bend s !! help as iam in so much pain !!  <response>: Hi, The symptoms you describe seem to be sudden in onset. Its most likely a sprain in back. It should go with rest, anti-inflammatory -analgesic pills ibuprofen like pills, muscle relaxant ointment, fomentation -in a couple of days. In case its long-standing, likely to be joint pain, spondylitis. In this condition proper examination, investigations treatment by an Orthopedic doctor would help n long run. Oral medicines, injections,physiotherapy are various ways to manage such condition. Thanks. 