This is explained above in our clarification of spinally motivated versus pseudo sciatica.
Sciatic nerve pain down both legs.
You might feel the discomfort almost anywhere along the nerve pathway but it s especially likely to follow a path from your low back to your buttock and the back of your thigh and calf.
Causes of sciatica in both legs.
Pain that radiates from your lower lumbar spine to your buttock and down the back of your leg is the hallmark of sciatica.
In the distant past i had widespread lower back and leg pain which was blamed on my 2 lumbar herniated discs and advanced degenerative disc disease.
My symptoms have always changed frequently and usually exist in both legs at once although the left side is often worse.
Bilateral sciatica in both legs can be caused by any number of conditions that affect the nerve roots which will eventually form the sciatic nerve l4 l5 s1 s2 and s3 as well as conditions that affect the fully formed sciatic nerve itself.