<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing low back pain for a while now and it seems to be getting worse. I also have constant headaches and my legs feel numb and tingly. Do you have any idea what could be causing this?  <response>: It sounds like you may have spinal stenosis, which is a narrowing of the spinal canal. This can cause pressure on the nerves and result in low back pain, headaches, and paresthesia or a tingling sensation in the legs. We will need to do some tests to confirm the diagnosis and determine the best treatment plan for you. 