What Is Sciatica? Understanding the Difference Between Sciatica and Other Causes of Leg Pain 

PATIENT EDUCATION
Written By Yakita Wilkinson

"I think I have sciatica." 

This is one of the most common statements I hear from new patients walking into my office. While sciatica is certainly a common condition, many people are surprised to learn that pain in the lower back, buttock, or leg does not automatically mean they have sciatica. 

In fact, research shows that several musculoskeletal conditions can closely mimic sciatic nerve pain. That's why a thorough clinical examination is essential before beginning treatment. 

What Is Sciatica? 

Sciatica is not a diagnosis—it is a term used to describe pain caused by irritation or compression of a lumbar or sacral nerve root that contributes to the sciatic nerve. This is also referred to as lumbar radicular pain or lumbar radiculopathy, depending on whether neurological deficits are present. 

The sciatic nerve is the largest nerve in the human body. It originates from the L4 through S3 nerve roots in the lower spine, travels through the buttock, down the back of the thigh, and branches into the lower leg and foot. 

When one of these nerve roots becomes irritated—most commonly from a lumbar disc herniation— patients may experience symptoms including: 

  • Sharp, burning, or electric-like pain 

  • Pain radiating into one leg

  • Numbness or tingling

  • Muscle weakness 

  • Changes in reflexes 

  • Pain that may worsen with coughing, sneezing, prolonged sitting, or straining 

While symptoms commonly travel below the knee, the exact location depends on which nerve root is involved (L4, L5, or S1). The diagnosis cannot be made based on pain location alone. 

What Does the Research Say? 

Current clinical guidelines emphasize that true sciatica cannot be diagnosed solely because pain travels into the leg. 

Instead, healthcare providers should combine: 

  • A detailed patient history 

  • Pain distribution 

  • Neurological examination

  • Muscle strength testing

  • Reflex testing 

  • Sensory examination

  •  Neural tension tests such as the Straight Leg Raise and Crossed Straight Leg Raise 

A 2021 systematic review of international clinical practice guidelines found strong agreement that these components are essential for diagnosing lumbar radicular pain, while routine imaging is not recommendedunless serious pathology is suspected or symptoms fail to improve with conservative care. Likewise, the NICE Clinical Guideline recommends assessing for nerve root involvement through a comprehensive physical examination and considering other potential causes of leg pain before diagnosing sciatica.  

Common Misconceptions 

One of the biggest myths is that any pain in the buttock or down the leg is sciatica. In reality, several conditions can closely mimic sciatic nerve pain, including: 

  • Sacroiliac (SI) joint dysfunction 

  • Piriformis syndrome 

  • Gluteal tendinopathy 

  • Hip joint disorders 

  • Hamstring injuries 

  • Lumbar facet joint irritation  

  • Myofascial trigger points 

These conditions often produce referred pain into the buttock or thigh but do not involve compression or irritation of the sciatic nerve itself. 

Another misconception is that an MRI alone diagnoses sciatica. Research has shown that many people without pain have disc bulges or degenerative changes on imaging. For this reason, imaging findings must always be interpreted alongside the patient's symptoms and physical examination.  

How I Evaluate Sciatica in My Office 

When someone tells me they have sciatica, my first goal isn't to confirm the diagnosis—it's to determine  why they're experiencing pain. 

During your examination, I evaluate: 

  • Movement patterns 

  • Joint mobility 

  • Muscle strength Reflexes 

  • Sensation 

  • Neural tension 

  • Functional movement 

This allows me to determine whether your symptoms are truly coming from a spinal nerve root or whether another structure is responsible for your pain. Once we identify the source, treatment can be individualized using chiropractic care, rehabilitation exercises, soft tissue therapy, dry needling, acupuncture, movement retraining, and lifestyle modifications when appropriate. 

Dr. Tannaz's Clinical Perspective 

One of the most valuable things I can offer my patients isn't simply treatment—it's an accurate diagnosis. Every week I see patients who have been told they have "sciatica," when their symptoms are actually coming from the SI joint, the hip, muscular trigger points, or another musculoskeletal condition. Likewise, I also see patients with true lumbar nerve irritation who have been treating the wrong area for months. Pain is simply your body's way of telling you something isn't right. Finding the source of that pain—not just treating where it hurts—is what leads to the best long-term outcomes. 

References 

•  National Institute for Health and Care Excellence (NICE). Low Back Pain and Sciatica in Over 16s: 

Assessment and Management (NG59). 2020 Update. 

•  Khorami A, Oliveira CB, Maher CG, et al. Recommendations for Diagnosis and Treatment of Lumbosacral  Radicular Pain: A Systematic Review of Clinical Practice Guidelines. Journal of Clinical Medicine. 2021. 

•  North American Spine Society (NASS). Evidence-Based Clinical Guideline for the Diagnosis and Treatment of Lumbar Disc Herniation with Radiculopathy. 3

Yakita Wilkinson https://www.shebrandsyou.com/
Previous

Your Mindset Matters: The Science Behind Shifting Your Perspective