If you are dealing with a sharp, burning, or aching pain shooting down your hip, buttock, or leg, you’ve likely heard someone say, “My sciatica is acting up again.”

Sciatica is one of the most common complaints evaluated and treated at Threshold PT. What often surprises patients is that while the pain shows up in the leg or hip, the root cause almost always originates higher up in the lower back.

The good news? Sciatica is highly treatable through targeted movement, nerve mobilization, and custom physical therapy—without the need for surgery or long-term prescription medication.

What Is Sciatica? (Lumbar Radiculopathy Explained)

The sciatic nerve is the largest and longest nerve in the human body. It branches from the L4 to S3 nerve roots in your lower spine and travels through the hip, down the back of the thigh, and into the calf and foot.

Sciatica isn’t a medical disease itself—it’s a symptom describing nerve pain along this pathway. In the physical therapy world, clinicians often refer to this as lumbar radiculopathy.

When a nerve root in the lower back becomes compressed, inflamed, or overloaded, it sends radiating alarm signals down the leg.

Telltale Signs of Sciatica

• Pain Quality: Sharp, burning, electric-shock, or deep, persistent aching.
• Multi-Region Discomfort: Pain spanning from the lower back/buttock down past the knee or into the foot.
• Posture Sensitivity: Symptoms that worsen during prolonged sitting, slouching, or driving.
• Muscular Ache Without Local Strain: Feeling severe tightness in the calf or hamstring, even though those muscles haven’t been directly injured.

Self-Assessment: The Slump Test for Sciatica

To check if your leg pain stems from sciatic nerve sensitivity, physical therapists frequently use the Seated Sciatic Neural Tension Test (or “Slump Test”):

1. Sit at the edge of a sturdy chair with your hands behind your back.
2. Slouch forward, rounding your upper back and bringing your chin toward your chest.
3. Slowly extend one leg out straight.
4. Flex your foot toward your shin (pulling your toes back toward your face).

What it means: If this sequence reproduces or intensifies the burning or aching down your leg—and lifting your head or pointing your toes releases that pain—you are likely experiencing sciatic nerve tension.

When to Seek Immediate Medical Attention

While the vast majority of sciatica cases resolve safely with physical therapy, you should seek emergency medical care if you experience any of the following “red flag” symptoms:

• Sudden loss of bowel or bladder control.
• Rapidly worsening muscle weakness (e.g., foot drop, or your knee giving out when walking).
• Numbness in the saddle area (inner thighs, groin, or buttocks).

The Golden Rule of Sciatica Rehab: Keep Moving

When sciatica strikes, your first instinct might be to stay in bed. However, research clearly shows that prolonged bed rest worsens sciatica outcomes by causing muscle stiffness, deconditioning, and increased nerve sensitivity.

Movement promotes blood flow, clears chemical inflammation around the nerve root, and helps the nerve glide smoothly through surrounding tissue. The key is moving within a safe, manageable range without pushing into severe pain.

Step 1: Discover if you have a “Directional Preference”

Most people with sciatica feel better moving in one specific direction—either lumbar extension (arching the back) or lumbar flexion (bending the back). Finding your preference is the fastest way to centralize your pain (bringing the pain out of the leg and moving it higher up toward the lower back).

Step 2: Restore Sciatic Nerve Mobility

Nerves need to slide and stretch within surrounding tissue. When a nerve becomes irritable, specialized nerve-gliding drills help desensitize it.

Step 3: Build Core & Hip Capacity

Once acute nerve irritation settles, rebuilding strength in the hips, glutes, and deep core prevents future flare-ups.

Key Takeaways for Sciatica Relief

1. Sciatica usually starts in the spine: Leg pain often comes from L4–S3 nerve root irritation.
2. Bed rest isn’t the cure: Gentle, frequent movement keeps blood flowing and restores nerve gliding.
3. Target your directional preference: Lean into postures (flexion or extension) that reduce leg symptoms.
4. Desensitize with nerve glides: Use sliders and tensioners to decrease nerve sensitivity over time.
5. Physical therapy works: The vast majority of sciatica cases improve rapidly with targeted, individualized physical therapy care.