"Sciatica" describes pain travelling down the leg along the distribution of the sciatic nerve, usually with pins and needles, numbness or weakness. It is a description of symptoms rather than a diagnosis in itself, and the useful clinical question is always what is irritating the nerve and where.
The reassuring part is that most sciatica improves without surgery. Symptoms commonly settle substantially over weeks to a few months, and even genuine disc herniations frequently resorb over time. Surgery speeds up recovery in selected cases but tends to produce similar outcomes at a year for most people.
The less reassuring part is that sciatica can be genuinely severe in the meantime, and how it is managed during that period matters considerably.
Common causes
Lumbar disc herniation
The most common cause, particularly under 50. Disc material irritates or compresses a nerve root. Frequently resorbs over months, which is why conservative management is usually tried first.
Foraminal or spinal stenosis
Narrowing of the space the nerve passes through, more common with age. Classically eased by sitting or leaning forward and worse on prolonged standing or walking.
Piriformis and deep gluteal syndrome
Irritation of the nerve by the deep hip muscles rather than the spine. Produces similar leg symptoms but different examination findings — and needs quite different treatment.
Pregnancy-related
Common in pregnancy from altered load, posture and fluid changes. Managed safely with positioning, manual therapy and specific exercise. See pregnancy physiotherapy.
Referred pain that is not sciatica
Sacroiliac joint, hip joint and gluteal tendon problems all refer pain into the buttock and thigh and are regularly mislabelled as sciatica. Distinguishing them changes the treatment entirely.
Pelvic causes
Less commonly, pelvic pathology can irritate the nerve. Assessment includes screening for this where the pattern is atypical.
What assessment establishes
The first task is confirming that this is genuinely nerve-related pain rather than referred pain from the sacroiliac joint, hip or gluteal tendons — a distinction that is missed often and changes everything about treatment.
The second is identifying which nerve root is involved, using the distribution of your symptoms together with testing of reflexes, muscle power and sensation. Different roots produce different, quite specific patterns.
The third is screening for the features that need onward referral: progressive or significant weakness, symptoms in both legs, or any suggestion of cauda equina syndrome.
The fourth is establishing your directional preference — the movements and positions that ease your leg symptoms and draw them back towards your spine. That finding directly shapes the exercise programme, and it varies considerably between people, which is why generic sciatica exercises so often fail.
Seek EMERGENCY care — A&E, immediately — for: numbness around the saddle or genital area, difficulty passing urine or loss of bladder or bowel control, sexual dysfunction of sudden onset, or weakness in both legs. These may indicate cauda equina syndrome, which needs urgent surgery.
How it is treated
Education and expectation setting
Knowing that most sciatica settles without surgery, that severe pain does not mean severe damage, and roughly what timeline to expect, substantially reduces distress — and distress amplifies nerve pain.
Symptom-relieving positions
Finding the positions and movements that reduce your leg symptoms, and using them frequently through the day. This is the highest-value early intervention and it is individual to you.
Directional exercise
Repeated movement in the direction that centralises your symptoms — drawing pain out of the leg and back towards the spine. Centralisation is a favourable prognostic sign and it guides the programme.
Neural mobilisation
Gentle techniques to restore the nerve's ability to glide within surrounding tissue. Dosage matters — too aggressive and it flares, which is a common self-treatment error.
Manual therapy
To reduce pain and restore movement in the spine, hip and surrounding muscles, making active rehabilitation possible.
Graded strengthening
Progressive loading of the trunk, hips and legs as symptoms allow, rebuilding the capacity lost during the acute phase and reducing recurrence risk.
Return to full activity
Staying as active as symptoms permit throughout, and building systematically back to full loading. Prolonged rest and avoidance predict worse outcomes.
How long it takes, and when to consider surgery
Most people improve substantially over six to twelve weeks, though some take longer, and residual pins and needles or patchy numbness can persist after the pain has gone as the nerve recovers slowly.
Improvement typically follows a recognisable sequence: the leg pain retreats upward towards the spine, then the back pain settles, then the neurological symptoms fade last. Pain moving out of the leg and into the back feels like a setback and is usually the opposite.
Surgery is considered where there is severe, unremitting pain not responding to conservative treatment over several weeks, progressive weakness, or cauda equina features requiring emergency intervention. At one year, outcomes for disc-related sciatica managed conservatively and surgically are broadly comparable for most people — surgery mainly buys faster relief.
Frequently Asked Questions
How long does sciatica last?
Most people improve substantially within six to twelve weeks, though some take longer, and residual pins and needles or numbness can persist after the pain has resolved as the nerve recovers gradually. Recovery typically follows a pattern where leg pain retreats towards the spine first, then back pain settles, then neurological symptoms fade last.
My leg pain is moving into my back. Is that bad?
Usually the opposite — it is one of the most encouraging signs in sciatica. Symptoms retreating from the leg towards the spine is called centralisation and indicates reducing nerve irritation. It often feels like a setback because the back pain becomes more noticeable, but it generally signals that treatment is working.
Do I need surgery for sciatica?
Most people do not. Conservative treatment resolves the majority of cases, and disc herniations frequently resorb over months. Surgery is considered for severe unremitting pain not responding over several weeks, progressive weakness, or cauda equina features requiring emergency intervention. At one year, conservative and surgical outcomes for disc-related sciatica are broadly comparable — surgery mainly achieves faster relief.
Should I rest or keep moving with sciatica?
Stay as active as your symptoms allow. Prolonged rest is associated with slower recovery and greater disability. That said, sciatica does have positions and movements that provoke it, and identifying which ones ease your leg symptoms — and using those frequently — is the highest-value early intervention. Activity within your tolerance, not activity regardless of pain.
What is the difference between sciatica and piriformis syndrome?
In classic sciatica the nerve is irritated at the nerve root in the spine, usually by a disc or narrowing. In piriformis or deep gluteal syndrome the nerve is irritated in the buttock by the deep hip muscles. The leg symptoms can appear similar, but examination findings differ and the treatments are quite different — which is why accurate assessment matters more than the label.
When is sciatica an emergency?
Go to A&E immediately if you develop numbness around the saddle or genital area, difficulty passing urine or loss of bladder or bowel control, sudden sexual dysfunction, or weakness in both legs. These can indicate cauda equina syndrome, which requires urgent surgical assessment. Severe pain alone, without these features, is not an emergency.
Clinically reviewed by Jency Sudha, Consultant Pelvic Health Physiotherapist & Biofeedback Specialist — last updated 26 July 2026
The information on this page is for general guidance and does not replace individual clinical assessment. If your symptoms are new, worsening, or accompanied by bleeding, fever or severe pain, contact your GP or NHS 111.
Get an Accurate Diagnosis First
A great deal of "sciatica" is referred pain from elsewhere — and that needs entirely different treatment.
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