<human>: IAM HAVING PAIN IN MY LOWER BACK  I FELLED DOWN THREE MONTHS AGO AND I HURT MY KNEE  I DID NOT SEE ANY SIGNS THAH IT MAY HAVE BEEN BROKEN BUT  IT DID HURT FOR  QUITE AWHILE NOW I AM FELLING AN ACHIHG SENSATION DOWN MY THIGH TO MY KNEE ALONG WITH THE BACK PAIN DO YOU THINK THIS MAY BE COMING FRO THE KNEE
<bot>: Hello! Thank you for asking on Chat Doctor! I understand your concern and would like to explain that your symptoms articular pain, irradiating by a possible disc displacement in your lumbar spine. A knee injury, involving the nerves would not cause pain in the thigh, or even more on your back, but it would cause pain locally or irradiating down the calf.  I recommend consulting with a neurologist for a careful physical examination, a lumbar spine x-ray and a nerve conduction study of the lower limbs.  A lumbar CT scan may be necessary to examine better your lumbar vertebral column. Meanwhile, I would advise you to have some rest and take some painkillers like acetaminophen or ibuprofen. Hope to have been of help! Best wishes!