<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have been trying to figure out why my legs are hurting so much, about an 8-10. Also my knees are hurting and are swollen all the time lately and are week, they give out a lot. I m recoding from thoriac back surgery, my surgeon cut a couple of chunks out and straightened my spine then fused from T8 to L1 were he tied into the 14 screws he placed while fussing L1-my sacrum in 2009, I now have 26 total screws. I m wondering if I injured my femoral nerve because my groin and inside of my legs hurt all the down to my ankles, along with my knee and leg pain?  <response>: Hi, Regarding your concern, I would explain that it is important performing some investigations to differentiate between two main possible causes that may lead to your symptoms: - a joint inflammation- a articular pain radiating from your back nerve compression. That, is why I would recommend performing some tests:- a nerve conduction study to examine your nerves-complete blood count, PCR, sedimentation rate for inflammation. You should discuss with your doctor on the above issues. Hope to have been helpful. Let me know if I can assist you further. Kind regards, 