<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing leg pain, back pain, bones are painful, stiffness all over, and knee pain. Do you know what could be the problem?  <response>: Based on your symptoms, it seems like you may be suffering from a bone disorder, possibly osteoporosis or arthritis. We will need to run some tests to confirm the diagnosis. 