What Causes Sciatica? Why Leg Pain Is Misdiagnosed

Summary

Radiating leg pain often referred to as sciatica can originate from spinal nerve roots, hip mechanics, or pelvic structures rather than a single MRI finding. Dr. Siefferman explains that focusing on an isolated herniated disc or tight muscle overlooks layered drivers like sacroiliac instability or double crush nerve irritation. Treating downstream muscle tightness like piriformis spasm without addressing upstream instability leaves the underlying driver unresolved. The article concludes that accurate management requires evaluating the entire lumbopelvic region to distinguish spine, hip, and nerve contributors.

Conditions and treatments discussed

• Sciatica. Irritation or compression of lumbar nerve roots can cause pain radiating from the low back down the leg.
• Lumbar Disc Herniation. A torn or bulging disc can chemically or mechanically irritate nearby spinal nerves.
• Piriformis Syndrome. A tight piriformis muscle can compress the sciatic nerve, often acting as secondary guarding for joint instability.
• Double Crush Syndrome. Nerve irritation occurring at two separate sites can amplify leg symptoms and complicate diagnostic evaluation.

What this shows about Manhattan Pain Medicine

In this post, Dr. Siefferman illustrates the practice-reported model of comprehensive diagnostic reconsideration by examining how radiating leg pain is frequently misattributed to a single scan result. Manhattan Pain Medicine describes evaluating the full lumbopelvic region to differentiate primary spinal drivers from secondary muscle guarding like piriformis tightness. The practice reports that identifying layered mechanical drivers, such as joint instability or dual-site nerve irritation, helps prevent treating downstream symptoms in isolation.