For most patients, a physiotherapist is the right first call

For the majority of people dealing with lower back pain or sciatica, the evidence points clearly to one starting point: a physiotherapist, not a pain consultant and not a spine surgeon. This is consistent with NHS regional pathways across England and with NICE guideline NG59, which together set out a stepped-care model — physiotherapy first, specialist input later, surgery only when specifically indicated.

The reason conservative care leads the pathway is grounded in the natural history of the condition. Up to 90% of sciatica cases resolve without any surgical intervention, typically over a period of several weeks to a few months. The central self-management message during that window is to keep moving: staying active — even when movement is uncomfortable — supports recovery, whereas prolonged bed rest does not.

If symptoms are not improving after four to six weeks of primary care management, a community MSK physiotherapist is the appropriate next step. Physiotherapy at this stage serves two purposes simultaneously: it delivers hands-on treatment and structured exercise, and it begins the clinical triage that determines whether a specialist referral is warranted. Around twelve weeks of failed conservative management is typically the threshold at which the pathway escalates to a spinal interface or CATS triage clinic, where a decision is made between a pain management consultant and a surgical opinion.

A small number of presentations bypass this pathway entirely — the red-flag signs that demand immediate emergency care are covered in a later section.

What physiotherapy involves and how to access it

A physiotherapist's first appointment is largely diagnostic. The clinician takes a detailed history of when and how symptoms developed, then assesses movement range, posture, and neurological signs — testing reflexes, dermatomal sensation, and muscle strength in the legs to build a picture of which nerve root, if any, is affected. This assessment also screens for red flags that would prompt immediate onward referral rather than a course of treatment.

In most NHS areas, patients can book directly: self-referral to community MSK physiotherapy is available online or by phone without a GP appointment first.

Once red flags are excluded, treatment typically combines manual therapy (soft tissue work and joint mobilisation), a structured exercise programme targeting core stability and neural mobility, and education around load management — understanding which activities to modify temporarily and how to return to normal movement progressively.

Where symptoms are unresolved after around twelve weeks of community-level management, the physiotherapist or GP escalates the referral not to a surgeon but to a Spinal Interface Service or CATS triage clinic. That intermediary step determines whether the clinical picture warrants a pain management consultant, a surgical opinion, or continued conservative care.

Patients who prefer faster access than NHS waiting times allow can see a physiotherapist privately; the clinical scope and assessment process are equivalent.

When a pain consultant becomes the right next step

Once triage at a Spinal Interface or CATS clinic is complete, the pathway branches. Patients whose MRI does not reveal a clearly surgically correctable lesion — disc compression with matching neurological deficit, for instance — are typically directed to a pain management consultant or rehabilitation physician rather than a surgeon. This is not a lesser option; it is the clinically appropriate one for a large proportion of people at this stage.

The pain consultant's scope extends into territory a physiotherapist cannot cover. Image-guided procedures — nerve root blocks and epidural steroid injections (ESI) — can target the specific anatomical source of pain with a precision that oral medication and exercise cannot reach. Johns Hopkins Medicine guidance explicitly advises patients to consult a rehabilitation physician or pain medicine specialist before approaching a spine surgeon, to ensure interventional options have been properly explored.

The outcome evidence for ESI at this stage is reasonably encouraging. A 2025 prospective study of 70 patients whose symptoms had not responded to conservative care found that pain scores fell from an average of 7.77 to 3.87 at six months, while Oswestry Disability Index scores halved from 59.11 to 31.25 — both statistically significant. These figures reflect a meaningful functional improvement, though individual results will vary and a consultant assessment determines suitability.

A pain consultant also conducts specialist pharmacological review — relevant because NICE NG59 advises against routine prescribing of opioids or gabapentinoids for sciatica, yet both are sometimes introduced in primary care before specialist input. The consultation provides an opportunity to rationalise medication alongside interventional treatment rather than layer them without clear indication.

When a spine surgeon is genuinely the right referral

Surgical referral is appropriate in a specific subset of cases — not simply when pain is severe or persistent, but when two conditions align: imaging shows a structural lesion (most commonly disc herniation compressing a nerve root at L4/L5 or L5/S1) that matches the clinical pattern of symptoms, and an adequate course of conservative management has not produced sufficient improvement.

Progressive neurological deficit changes the calculation. Worsening foot drop, for example, signals active nerve damage that may not wait for the standard conservative window to close. In these cases, escalation to a surgical opinion is clinically justified earlier — not because pain alone demands it, but because the underlying nerve injury may deteriorate with delay.

Even then, the evidence for surgery is more nuanced than many patients expect. A 2024 systematic review and meta-analysis involving 352 participants found that surgical treatment produced significantly greater improvement in back pain specifically — but conservative care produced better outcomes for leg pain and superior scores on both mental and physical health measures. Surgery is a valid option at this stage; it is not a universally superior one, and the data support exhausting conservative management first unless a clear neurological indication is present.

One common misconception is that a concerning MRI finding alone justifies a surgical referral. NICE NG59 advises against routine early MRI in primary care precisely because imaging changes — including disc bulges and nerve root contact — are frequently found in people with no symptoms at all. A structural finding only becomes a surgical indication when it correlates with the clinical picture and symptoms have not responded to appropriate prior treatment. Imaging informs the decision; it does not make it.

Red flags that bypass the whole pathway

Some symptoms signal that the entire stepped-care pathway — physiotherapy, pain consultant, surgical referral — is irrelevant. These require emergency care, and the right response is to call 999 or go to A&E immediately.

Cauda Equina Syndrome (CES) is the most critical. It occurs when nerve roots at the base of the spine are severely compressed and demands same-day emergency assessment. Seek emergency care without delay if any of the following are present:

• Loss of bladder or bowel control, or new difficulty initiating urination
• Altered or absent sensation in the saddle area (inner thighs, perineum, genitals, or anus)
• Sudden bilateral sciatica — severe leg pain on both sides at once
• Severe or rapidly worsening weakness in both legs

Do not call a clinic or attempt to book a routine appointment. Call 999 or go to A&E.

Other urgent red flags

Certain other features warrant urgent GP contact or emergency review rather than a standard outpatient pathway:

• Fever alongside back pain (possible spinal infection)
• Unexplained significant weight loss
• A known or previous cancer diagnosis with new back pain
• Constant, unrelenting pain that does not ease in any position, particularly if it worsens at night

These features do not automatically confirm a serious diagnosis, but they are sufficiently important to rule out quickly. They are not suitable for a physiotherapy self-referral or a directory search — they need prompt clinical assessment through urgent or emergency channels.

Finding the right specialist for your situation

Translating the stepped-care pathway into action depends on where a patient currently sits within it.

For a first presentation of lower back pain or sciatica, the practical starting point is self-referral to NHS community MSK physiotherapy — available without a GP letter in most areas of England — or asking a GP to arrange it.

After adequate physiotherapy without sufficient improvement, the conversation shifts to escalation: a spinal triage or CATS clinic referral, a pain consultant for injection-based management, or — where NHS waiting times are a constraint — a private MSK assessment. The clinical sequence remains the same regardless of whether care is NHS or private; private access compresses the timeline, not the logic of the pathway.

For patients exploring private options, Search MSK lists physiotherapists, pain consultants, and spine specialists across the UK — filtering by region and specialty helps identify a clinician matched to the current stage of care.

NICE NG59, last reviewed in July 2026, is the overarching UK guideline on low back pain and sciatica. Citing it by name can help anchor a conversation with a GP about escalation timing or treatment choices.

The evidence running through this pathway points to the same reassuring conclusion for most patients: the large majority of sciatica cases resolve with appropriate conservative management. The pathway's purpose is to match each patient to the right level of expertise — and to ensure that specialist or surgical input is available precisely when it is needed, not simply when symptoms feel alarming.