Orthopedic and movement
Sciatica: Leg Pain from a Compressed Nerve Root
Expert-reviewed guidance on sciatica — how it differs from back pain, how long recovery takes, and what actually helps while you wait.
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Sciatica describes pain traveling from the lower back into the buttock and down the leg, following the path of a nerve root — usually because a disc or bony change is irritating or compressing that nerve where it exits the spine. It's a distinct problem from back pain alone, and the distinguishing feature is that the leg symptoms dominate: pain, numbness, pins and needles, or weakness in a pattern that follows the nerve rather than spreading vaguely. Most cases improve over weeks to months without surgery, though recovery is typically slower than for uncomplicated back pain. Progressive weakness, or numbness around the genitals or inner thighs, requires urgent medical attention.
What sciatica is, and what it isn't
Sciatica is a symptom, not a diagnosis. It describes pain in the distribution of a nerve root, usually L4, L5, or S1.
The distinguishing feature is the leg. Back pain that spreads into the buttock is common and usually isn't sciatica. Sciatica means the leg symptoms are the dominant problem, following a recognizable path — often below the knee — with numbness, tingling, or weakness in a matching pattern.
- A disc herniation pressing on a nerve root.
- Narrowing of the space the nerve passes through, more common with age.
- Less commonly, other structural causes.
"Sciatica" is used loosely for almost any leg pain. True radicular pain follows a nerve pattern; pain that wanders or doesn't follow one usually has a different explanation.
→ Low back pain, if your pain is mainly in the back
Diagnosis
Usually clinical. Where the pain travels, what makes it worse, and testing of reflexes, sensation, and strength in the pattern of specific nerve roots.
Imaging isn't needed initially in most cases. Disc herniations appear in people with no symptoms, so a scan alone doesn't establish that a visible herniation is causing your pain. → What imaging shows
Imaging is indicated where red flags are present, symptoms persist despite treatment, or surgery is being considered.
What helps with sciatica
- Stay as active as symptoms allow. As with back pain, prolonged rest slows recovery. Movement may need modifying substantially in the early stages.
- Physical therapy — graded exercise, nerve mobility work, education on positions that ease and aggravate symptoms, and progressive return to activity. → Find a physical therapist
- Time. Most disc herniations reduce in size on their own, and symptoms frequently resolve as they do. That process takes weeks to months, which is genuinely difficult when the pain is severe.
- Pain management, discussed with your doctor. Nerve pain sometimes responds differently to ordinary pain relief.
- Injections may be considered where pain is severe and not settling — usually to provide a window in which rehabilitation becomes possible, rather than as treatment on their own.
Surgery is considered where symptoms are severe and persistent despite conservative treatment, or where there's progressive neurological loss. For most people, outcomes at one year are similar with or without surgery — surgery often provides faster relief in the early months.
What a course of physical therapy involves
- Assessment establishes which nerve root is involved and what positions ease or aggravate it.
- Early sessions focus on finding positions of relief, maintaining movement, and reducing fear of moving — which is a genuine obstacle when leg pain is severe.
- As symptoms settle, work progresses to strengthening, restoring normal movement, and returning to full activity.
- Recovery is often slow, and progress is measured in weeks rather than days.
Goals worth setting
Sit for a 40-minute meeting · Drive for an hour · Sleep without waking from leg pain · Walk to the store and back · Return to work
Reduce nerve pain · Improve straight leg raise
What recovery usually looks like
Most people improve substantially within six weeks to three months. Some take longer.
Numbness and tingling often outlast the pain, sometimes by months. That's usually the nerve recovering rather than a sign of continued compression.
Weakness needs monitoring. Mild weakness that's improving is expected. Weakness that's worsening needs prompt medical review.
Related conditions
Conditions and pages that commonly come up alongside sciatica.
Low back pain
The related problem without the leg symptoms — and the one sciatica is most often confused with.
Learn more →Neck pain
The same nerve-root picture higher up, where symptoms travel into the arm instead.
Learn more →Recovery after back surgery
The stages of recovery, what physical therapy does, and why the surgeon's protocol comes first.
Learn more →Chronic pain and fibromyalgia
When pain persists beyond three months, the approach changes. What that involves.
Learn more →Find a physical therapist · Find an occupational therapist · Adult orthopedic therapy · All adult therapy
Frequently Asked Questions
How long does sciatica last?
Most people improve substantially within six weeks to three months, though some take longer. Recovery is typically slower than for uncomplicated back pain.
Should I rest with sciatica?
Stay as active as symptoms allow. Prolonged rest slows recovery, though activity may need modifying substantially early on.
Do I need surgery for sciatica?
Most people don't. Surgery is considered for severe persistent symptoms despite conservative treatment, or progressive neurological loss. At one year, outcomes are broadly similar with or without surgery — surgery often provides faster relief in the early months.
Why do I have numbness and tingling?
The nerve root is irritated or compressed, affecting the signals it carries. These sensations often outlast the pain and usually reflect the nerve recovering.
My pain moved from my leg into my back. Is that bad?
Usually the opposite. Pain retreating from the leg toward the spine — centralization — generally indicates improvement, even if back pain increases temporarily.
Is walking good for sciatica?
Generally yes — staying as active as symptoms allow is better than prolonged rest, which slows recovery. Movement may need modifying substantially in the early stages, and finding positions of relief comes before building distance.
Can a physical therapist help with sciatica?
Yes. A course covers establishing which nerve root is involved and what eases or aggravates it, graded exercise, nerve mobility work, and a progressive return to activity. Early sessions focus on positions of relief and on reducing fear of moving, which is a genuine obstacle when leg pain is severe.
When is sciatica an emergency?
Numbness around the genitals or inner thighs, loss of bladder or bowel control, weakness in both legs, or sciatica in both legs at once all require urgent medical attention.
Sources
- Qaseem A, et al. Noninvasive Treatments for Acute, Subacute, and Chronic Low Back Pain: A Clinical Practice Guideline From the American College of Physicians. Annals of Internal Medicine. 2017; 166(7). doi:10.7326/M16-2367
- National Institute of Arthritis and Musculoskeletal and Skin Diseases. Back Pain. niams.nih.gov. Checked August 21, 2026.
Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your individual situation. Seek urgent medical attention for any of the symptoms listed above.