Wow. I am so glad I found this. I, too, have been having lower spine issues that suddenly blossomed to sciatic pain down both legs. Since this was new -- I've been having problems due to exaggerated lordosis for decades, and worse pain for the last three or more years -- I saw my doctor and he ordered a lumbar MRI. The report said that at T11-T12, "There is right intraforaminal perineural cyst likely of no clinical significance." I asked my doctor if that could explain anything and he said no. He said there wasn't anything he could do for my pain, but if it got worse we could try epidural injection. I am in chronic pain, have trouble sleeping, and any movement (walking, stretching, bending) causes pain, especially down one leg, but sometimes both.

I haven't seen a neurologist for any of this, but I have been considering it.