Sciatica: Causes, Symptoms, and Treatment Options

Sciatica is one of the most common reasons adults seek pain management care. The word itself is used loosely to describe any pain radiating from the lower back into the leg, but clinically it refers to a specific pattern with specific causes. Understanding what is actually happening often changes what treatment makes sense. This guide explains sciatica in the detail patients usually want before making treatment decisions.

What Sciatica Is

Sciatica is pain that follows the distribution of the sciatic nerve, which starts in the lower back, passes through the pelvis, and runs down the back of the leg. The term is often used for any lower-back-to-leg pain, but precisely, sciatica refers to pain along the sciatic nerve’s path — typically from the lower back and buttock, down the back of the thigh, past the knee, and sometimes into the lower leg and foot.

Classic features:

• Pain that starts in the lower back or buttock and radiates down one leg
• Pain often described as burning, shooting, or electric
• Pain that may be worse with certain positions (especially sitting) and relieved by others (sometimes standing or lying down)
• May include numbness, tingling, or weakness in parts of the leg or foot
• Typically affects one side

What Actually Causes the Pain

Sciatica itself is a symptom, not a diagnosis. The underlying cause — the thing actually irritating the sciatic nerve or one of the nerve roots that feed into it — needs to be identified to guide treatment. Common causes:

Lumbar disc herniation. The most common cause in younger and middle-aged patients. An intervertebral disc in the lower back bulges or herniates and presses on a nerve root. The inflammation around the disc contributes to the pain.

Spinal stenosis. Age-related narrowing of the spinal canal or the openings where nerve roots exit the spine. More common in older adults. The classic pattern: pain that worsens with standing and walking, and improves with sitting or leaning forward.

Degenerative disc disease. Changes in disc structure with age that can produce chronic lower back and sometimes radiating pain.

Piriformis syndrome. The sciatic nerve passes near (or through) the piriformis muscle in the buttock. Tightness or trigger points in the piriformis can irritate the nerve, producing sciatica-like symptoms without a disc problem.

Spondylolisthesis. Forward slippage of one vertebra on another, which can cause nerve compression.

Less common causes. Tumors, infections, and certain systemic conditions can produce sciatica, though these are much less frequent.

A careful evaluation — history, physical examination, and usually imaging (most often MRI) — identifies the specific cause, which in turn shapes the treatment plan.

When to See a Specialist

Most acute sciatica improves within a few weeks with basic care. Consider a pain management or spine specialist consultation if:

• Pain has lasted longer than four to six weeks without meaningful improvement
• Pain is interfering with work, sleep, or daily activities
• You have significant weakness in the leg or foot
• Numbness or tingling is spreading
• Pain is severe enough that standard over-the-counter medication is not adequate
• You are considering surgery and want to explore non-surgical options

Certain features require more urgent attention rather than scheduled outpatient evaluation — progressive weakness, new bladder or bowel dysfunction, pain with saddle-area numbness, fever, or severe pain following major trauma. Call your primary care doctor or go to an urgent care facility for these.

Diagnostic Workup

A typical diagnostic evaluation for sciatica includes:

Detailed history. How did the pain start, what does it feel like, where does it travel, what makes it better and worse?

Physical examination. Strength testing, reflex testing, sensory testing in specific nerve distributions, maneuvers that reproduce the pain and help identify the nerve root involved, and assessment of the hip and sacroiliac joint to help distinguish other sources.

Imaging. MRI is the most informative study for sciatica because it shows disc, nerve, and soft tissue anatomy. X-rays show bone but not the soft tissues where most sciatica causes are found. Imaging is not always needed in the first few weeks, but it becomes important when pain has persisted or when specific features suggest urgency.

Additional testing. Occasionally, nerve conduction studies or EMG may be ordered to characterize nerve function.

Treatment Options

Treatment for sciatica depends on the underlying cause and the severity of symptoms. A typical stepped approach:

Initial conservative care. For most patients, sciatica improves over weeks with a combination of activity modification (avoiding things that clearly worsen symptoms, continuing gentle activity otherwise), over-the-counter anti-inflammatory medication, heat or ice, and time. Strict bed rest is no longer recommended.

Physical therapy. Structured physical therapy addressing the mechanical contributors to the pain is a common next step. Specific exercises may include nerve glides, core strengthening, and exercises directed at the underlying cause.

Medication. Non-opioid analgesics, anti-inflammatory medications, nerve-pain medications, and muscle relaxants may all be appropriate in specific situations.

Lumbar epidural steroid injection. For patients with ongoing sciatica from a clear nerve root source — typically confirmed by clinical findings and imaging — an epidural injection can reduce inflammation at the nerve root and provide meaningful relief. The injection is typically part of a broader plan.

Surgery. For patients who do not improve adequately with non-surgical care, or for those with specific indications (significant weakness, cauda equina syndrome, certain anatomic patterns), surgery may be considered. A pain specialist can help you think through the surgical decision.

Treatment of specific non-disc causes. Piriformis syndrome, for example, may respond to trigger point injections and specific physical therapy rather than epidural injections.

The Time Course

A realistic sense of the time course helps with treatment decisions:

First few weeks. Many acute sciatica episodes improve on their own during this window with basic care.

Four to twelve weeks. Pain that persists into this window often benefits from more active treatment — structured physical therapy, appropriate medication, and for selected patients, an epidural injection.

Beyond three months. Sciatica that remains significant after three months has become chronic. The treatment approach shifts; the specialist role becomes more important; and surgery is considered more seriously if non-surgical measures have not been adequate.

Sciatica Care at Southwest Pain Management

Our clinics regularly treat sciatica with a full range of non-surgical approaches — physical therapy coordination, medication management, and interventional procedures when indicated. Our starting point is always a careful evaluation to identify the specific cause, because the right treatment depends on the right diagnosis.

Frequently Asked Questions

How long does sciatica usually last? Most acute sciatica improves over weeks. Sciatica that persists beyond six to twelve weeks often benefits from more active treatment.

Does sciatica always mean a disc problem? Not always. Disc problems are a common cause, but other conditions can produce sciatica-like symptoms. A careful evaluation identifies the actual cause.

When is surgery necessary for sciatica? Most sciatica is managed without surgery. Surgery is considered when non-surgical options have not been adequate, when specific indications are present (such as significant weakness), or when the patient’s clinical situation suggests surgery is the better option.

Is an MRI needed to diagnose sciatica? Not always in the first few weeks. MRI becomes important when pain has persisted, when specific features suggest urgency, or when surgical or interventional treatment is being considered.

Can I exercise with sciatica? Usually yes, though specific guidance depends on what is driving the pain. Some activities may worsen symptoms; others are well-tolerated and contribute to recovery. Physical therapy provides guided, appropriate exercise.

What is the difference between sciatica and piriformis syndrome? Both produce pain radiating down the leg. Sciatica classically comes from nerve root irritation in the spine; piriformis syndrome comes from irritation of the sciatic nerve by the piriformis muscle in the buttock. The distinction matters because the treatments differ.

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