By Dr. Zach Greenwade, DC, MS | Published: July 3rd, 2026
Sciatica is one of the most misunderstood terms in healthcare. In fact, it is often used as a “garbage can” term to describe almost any type of pain, tingling, or numbness running down the back of the leg.
But true sciatica isn’t a vague catch-all diagnosis—it is a specific type of nerve irritation. If you are trying to figure out your leg pain, here are the 6 main points you need to know:
1. Their bum hurts
That 1968 study proves that pinching a nerve in your lower back sends pain directly into your buttock, meaning that “tight hip” feeling is often actually a back issue in disguise.
Aggressively stretching your hip when a spinal nerve is actually the culprit will only irritate the nerve further, which is why treating the back is the real key to relief.
2. True Sciatica Travels Past the Knee
Because “sciatica” is often used as a garbage can term, people mistake localized lower back or glute pain for it. True sciatica is characterized by radiculopathy—pain, burning, or pins-and-needles that shoot past the knee and into the calf or foot. Pain that travels below the knee is more suggestive of lumbar nerve root irritation, while pain confined to the lower back or buttock is more likely to have another cause. However, symptoms can vary, and a thorough evaluation is important.
3. Disc Herniations Are the Most Common Trigger
The most frequent culprit is a lumbar disc herniation or bulge pressing against a spinal nerve root. While “herniated disc” sounds terrifying, the vast majority naturally resorb and heal over time without surgery or invasive interventions.
4. And it’s not just the pain
The Reality: Pain or “weird” neurological sensations that travel below the knee—such as buzzing, tingling, pinpricks, hot or cold flashes, or the feeling of water running down the skin—are strong indicators of lumbar nerve root irritation (radicular pain/sciatica), not the SI joint. These strange symptoms occur when a compressed or damaged spinal nerve sends junk action potentials to the brain, which the brain mistakenly interprets as a sensation in the leg. True SI joint pain typically stays confined to the lower back or buttock region, making a thorough clinical evaluation essential to separate nerve injuries from joint issues.
5. Movement is Medicine (Skip the Bed Rest)
The old advice was to rest in bed, but today we know that prolonging rest causes joints and muscles to stiffen, stretching out your recovery. Unless you have severe neurological deficits, gentle walking and targeted nerve-gliding movements are essential to pump away inflammation.
6. Track “Centralization” to Know You’re Healing
As sciatica improves, the pain undergoes a process called centralization. This means the pain leaves your foot and calf, moves up into your thigh, and eventually retreats back to your lower back before disappearing entirely. Even if your lower back feels a bit more sore, if the pain is leaving your leg, you are on the right track.
7. Nerves hate stretching
Testing nerve sensitivity doesn’t require a miserable, aggressive straight leg raise on a hard exam table when a seated slump test is often much gentler and gives you the exact same answers.
By finding out which specific movements tug on the nerve, patients quickly realize why certain daily habits hurt and how they can actually use gentle, targeted movements to calm the nerve down.
Not Sure Where Your Pain Is Coming From?
Because the lower back, pelvis, and hips are all intimately connected, it can be tricky to tell the difference between a disc bulge, a muscular spasm, or a pelvic joint misalignment.
If your pain stays localized to your lower back or sits right on the dimples of your upper pelvis, you might be dealing with an SI joint issue rather than a nerve root irritation. Check out our comprehensive guide to find out:
👉 [Read Our Guide on Lower Back Pain and SI Joint Dysfunction Here]
Frequently Asked Questions About Sciatica
What does true sciatica feel like?
True sciatica typically feels like a sharp, shooting, electric, or burning pain that starts in the lower back or buttock and travels down the back of the thigh, past the knee, and into the calf or foot. It is often accompanied by numbness, tingling, or a “pins and needles” sensation along that exact path.
Why do people call sciatica a “garbage can” term?
Because “sciatica” simply describes pain traveling down the leg, it is often used as a catch-all phrase for any back-of-leg discomfort. However, many things can mimic it—such as a tight piriformis muscle, hamstring strains, or sacroiliac (SI) joint dysfunction—without the actual sciatic nerve being compressed at the spine.
How can I tell the difference between sciatica and SI joint pain?
The easiest indicator is where the pain goes. True sciatica almost always travels past the knee and down into the lower leg. Sacroiliac (SI) joint pain tends to stay localized to the lower back and glute, right around the bony dimples of your upper pelvis, and rarely travels past the back of the thigh.
Is walking good for sciatica?
Yes, gentle walking is highly recommended for most people dealing with sciatica. Unlike strict bed rest, which causes joints and muscles to stiffen up, walking keeps the spine mobile, improves blood flow, and helps the body naturally pump away the localized inflammation surrounding the nerve root.
What is the fastest way to relieve sciatica pain?
The most effective way to find relief is to keep moving within a pain-free range of motion. Avoid prolonged sitting or bending forward, which can increase pressure on spinal discs. Incorporating gentle walking, core stabilization, and nerve-gliding exercises under the guidance of a professional can significantly speed up your recovery.
Ready to Build a Resilient, Pain-Free Spine?
To see form modifications, visual breakdowns, and a guided walkthrough of every exercise covered in this guide, check out our full YouTube Guide: Best Low Back Pain Stretches & Exercises.
If you are currently navigating an episode of back pain and want a personalized, evidence-based roadmap to fast-track your recovery, our clinical teams in Redmond and Seattle are here to guide you.
Book Your Appointment Online with Performance Sport & Spine
About the Author
Dr. Greenwade, DC, MS is an evidence-based sports chiropractor, movement specialist, and the founder of Performance Sport & Spine, serving patients across the Eastside in Redmond and Seattle. Holding a Master of Science in sports medicine alongside a Doctorate of Chiropractic, Dr. Greenwade specializes in modern physical medicine, progressive loading, and active, movement-based recovery. The clinic’s mission is to help active individuals and office professionals resolve acute and chronic musculoskeletal conditions without unnecessary injections, medications, or surgeries.
Medical Disclaimer
Disclaimer: The information provided in this article, including text, graphics, images, and other material, is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider, such as a sports chiropractor, physical therapist, or medical doctor, with any questions you may have regarding a medical condition or treatment plan. Never disregard professional medical advice or delay seeking it because of something you have read on this website.
