Not Every Pain Down the Leg Is Sciatica

A Term Used More Loosely Than It Should Be

"Sciatica" is commonly used by patients and, at times, clinicians as a catch-all term for almost any pain travelling down the leg. Strictly, true sciatica refers specifically to radicular pain caused by irritation or compression of one of the nerve roots that contribute to the sciatic nerve, most often from a lumbar disc protrusion.

A Genuinely Common but Frequently Misattributed Pattern

Epidemiological reviews estimate true sciatica accounts for a meaningful but far from universal proportion of leg pain presentations, with reported lifetime incidence ranging widely across populations depending on diagnostic criteria used (Konstantinou & Dunn, 2008) — a range that itself reflects how inconsistently the term is applied.

What Else Can Produce Pain Down the Leg

Referred pain from the sacroiliac joint or hip, peripheral nerve entrapments distal to the spine, vascular claudication, and even somatic referred pain from lumbar facet joints or deep gluteal structures can all produce leg pain that is frequently mislabelled as sciatica. Distinguishing true radicular sciatica from these mimics generally requires a careful neurological examination alongside a clear history of the pain's distribution and behaviour, not simply its presence below the knee.