Sciatica vs. Lower Back Pain — How to Tell the Difference and What to Do

Lower back pain is one of the most common reasons people see a physical therapist — but not all back pain is the same. Sciatica is a specific type of nerve pain, while general lower back pain usually comes from muscles, ligaments, or joints. Knowing the difference changes how it should be treated.

At Town Physical Therapy, we evaluate dozens of patients every week with one simple question: “Is this sciatica, or just my back?” Here’s how we tell the difference — and what we’d recommend if it were you.

What’s the Real Difference?

The simplest way to think about it: lower back pain stays in your back. Sciatica travels.

Sciatica refers to pain caused by irritation or compression of the sciatic nerve — the longest nerve in your body, running from your lower spine through your hip and down each leg. When something presses on or irritates this nerve, you feel pain not just in your back, but radiating down your leg.

Regular lower back pain, on the other hand, is usually mechanical — coming from strained muscles, irritated joints, or ligament sprains in the lumbar spine. It can be intense, but it typically doesn’t travel past the buttock.

What Is Sciatica?

Sciatica isn’t a diagnosis on its own — it’s a symptom of an underlying issue compressing the sciatic nerve. Common symptoms include:

Sharp, shooting, or burning pain down one leg
Pain that worsens when sitting
Numbness or tingling in the leg or foot
Muscle weakness in the leg or foot
Pain that radiates from the lower back through the buttock and down the back of the thigh
Usually affects only one side of the body

Sciatica pain can range from a mild ache to a sharp, electric-shock sensation that makes it difficult to stand, walk, or sit for long periods.

What Is Regular Lower Back Pain?

Mechanical lower back pain stays localized and usually stems from muscle strain, joint irritation, or poor movement patterns. Common symptoms include:

Dull, aching, or stiff pain in the lower back
Pain that worsens with certain movements (bending, twisting, lifting)
Muscle tightness or spasm
Pain that improves with rest or position changes
No numbness or tingling down the leg
Often affects both sides of the lower back

Symptom Checklist: Which One Do You Have?

Symptom	Sciatica	Lower Back Pain
Pain location	Radiates down one leg	Stays in the lower back
Numbness or tingling	Common, in leg or foot	Rare
Affected side	Usually one-sided	Often both sides
Worsens when sitting	Often yes	Sometimes
Triggered by movement	Sometimes	Almost always (bending, lifting)
Muscle weakness	Possible, in the leg	Rare
Pain quality	Sharp, shooting, burning	Dull, aching, tight

What Causes Each Condition?

Common causes of sciatica:

Herniated or bulging disc pressing on the sciatic nerve
Spinal stenosis (narrowing of the spinal canal)
Piriformis syndrome (a tight muscle compressing the nerve)
Degenerative disc disease
Spondylolisthesis (a vertebra slipping out of place)

Common causes of mechanical lower back pain:

Muscle strain from lifting, twisting, or overuse
Poor posture, especially from prolonged sitting
Weak core or hip muscles
Sudden movements or awkward sleeping positions
General wear and tear on the spine over time

When to Seek Care Immediately

Seek Emergency Care If You Experience:

Loss of bladder or bowel control, numbness in the groin/inner thigh area, or progressive weakness in both legs. These can be signs of a rare but serious condition called cauda equina syndrome and require immediate emergency attention.

For most other cases of sciatica or back pain, you don’t need to rush to the ER — but you also shouldn’t wait it out indefinitely. If pain lasts more than a few days, or limits your daily activities, it’s time to get evaluated.

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How Physical Therapy Treats Each Condition

The good news: both sciatica and mechanical lower back pain respond extremely well to physical therapy — but the approach differs.

For sciatica, treatment typically includes:

Nerve gliding exercises — gentle movements to reduce nerve irritation
Directional preference exercises — movements that relieve disc-related pressure on the nerve
Manual therapy — to relieve muscle tension around the compressed nerve
Dry needling — particularly effective for piriformis-related sciatica
Core and hip strengthening — to reduce strain on the lower spine long-term

For mechanical lower back pain, treatment typically includes:

Manual therapy — to restore joint mobility and reduce muscle guarding
Core stabilization exercises — to support the lumbar spine
Postural retraining — especially for desk workers
Progressive strengthening — to build resilience and prevent recurrence

Frequently Asked Questions

1. How do I know if my back pain is sciatica?

Sciatica typically causes pain that radiates from your lower back or buttock down one leg, often past the knee, along with numbness, tingling, or weakness. Regular lower back pain usually stays localized to the back without traveling down the leg.

2. Can physical therapy fix sciatica?

Yes. Physical therapy is one of the most effective non-surgical treatments for sciatica. A physical therapist identifies the underlying cause — such as a disc issue or piriformis tightness — and builds a treatment plan to relieve nerve compression and prevent recurrence.

3. How long does sciatica take to heal?

Many cases of sciatica improve significantly within 4 to 8 weeks of consistent physical therapy. More severe or chronic cases may take longer. Your physical therapist will give you a personalized timeline after your evaluation.

4. Do I need a referral to see a physical therapist in NJ?

No. New Jersey allows direct access to physical therapy, meaning you can see a physical therapist without a doctor’s referral for up to 30 days of treatment.

5. When should I see a doctor instead of a physical therapist?

See a doctor immediately if you experience loss of bladder or bowel control, numbness in the groin area, or progressive leg weakness. For most other symptoms, a physical therapist can evaluate you directly and refer you to a physician if needed.

How Town Physical Therapy Can Help

Whether you’re dealing with sciatica or general lower back pain, the team at Town PT starts every case with a thorough evaluation to identify the actual source of your pain — not just the symptoms. From there, we build a plan designed around your specific diagnosis, lifestyle, and goals.

One-on-one care — your therapist treats you directly, every visit
Dry needling and manual therapy — for fast, targeted relief
Custom strengthening programs — to keep the pain from returning
Most major insurances accepted — including Horizon BCBS, Aetna, Cigna, and Medicare
Six convenient NJ locations — Clifton, Paramus, Maywood, Emerson, Bergenfield, and Jersey City

Don’t Wait for the Pain to Get Worse

Whether it’s sciatica or just a stubborn ache, our team can help you figure out exactly what’s going on — and how to fix it.

Book an Appointment

About the Author: Town PT

Town Physical Therapy is a premier provider of personalized physical therapy services, dedicated to helping patients achieve optimal health and wellness. With locations in Maywood, Bergenfield, Paramus, Clifton, and Emerson, our experienced team offers a wide range of treatments.