Why Does My Back Hurt? A Physiotherapist's Guide to Spine Pain Assessment

Back and neck pain affect an estimated 80% of people at some point in their lives — yet most people either ignore it, self-medicate, or Google their symptoms and land on the wrong answer. The truth is that spine pain is rarely straightforward. It can originate from a muscle, a disc, a nerve, a joint, or a combination of structures — and the treatment that works for one cause can actually make another worse.

That's why assessment comes before everything else.

This guide walks you through exactly how spine pain is assessed by a qualified clinician, what warning signs you should never ignore, and what the findings typically mean for your treatment and recovery.

Understanding the Spine: Why It's So Easy to Get Wrong

The spine is not one structure — it's a layered system of 33 vertebrae, 23 intervertebral discs, dozens of joints, hundreds of muscle attachments, and an intricate network of nerves running through and around it. Pain can arise from any of these, and symptoms often overlap significantly between conditions.

The spine is divided into three regions:

• Cervical spine (neck) — 7 vertebrae; pain here often radiates into the arms and hands
• Thoracic spine (mid-back) — 12 vertebrae; less commonly injured but often affected by posture-related issues
• Lumbar spine (lower back) — 5 vertebrae; the most frequently affected region, carrying the greatest mechanical load

Spine pain is classified by duration:

Understanding which category you fall into shapes the entire assessment and management approach.

Step 1: Patient History — The Most Important Diagnostic Tool

Before any scan, test, or hands-on examination, a thorough patient history is taken. Experienced clinicians know that the history alone can point strongly toward the correct diagnosis in the majority of spine pain cases.

What your clinician will ask — and why it matters

Where exactly is the pain? The precise location matters. Pain localised to one side of the lower back suggests facet joint or muscle involvement. Pain that crosses the midline and radiates down the leg suggests disc or nerve root involvement.

When did it start, and how? Sudden onset after lifting or twisting suggests an acute muscular or disc injury. Gradual onset over weeks or months with no clear trigger is more consistent with degenerative changes.

What does it feel like? Pain quality is diagnostically useful:

• Sharp or stabbing — often mechanical or facet joint
• Burning or electric — suggests nerve involvement
• Deep, aching, constant — may indicate inflammatory or visceral causes
• Shooting pain into limbs — radiculopathy (nerve root compression)

What makes it better or worse?

• Pain relieved by lying down → mechanical; pain unrelieved by any position → possible serious pathology
• Pain worsened by forward bending → likely disc-related
• Pain worsened by backward bending or prolonged standing → often facet joint or stenosis
• Morning stiffness lasting > 30 minutes → consider inflammatory arthritis

Are there any other symptoms? Numbness, tingling, or weakness in the arms or legs suggests nerve involvement and changes the urgency and direction of assessment significantly.

Step 2: Red Flag Screening — What Cannot Be Missed

Before any rehabilitation-focused assessment begins, clinicians screen for red flags — symptoms that may indicate a serious underlying condition requiring urgent medical investigation rather than physiotherapy.

The presence of any red flag changes the entire clinical pathway. These patients require imaging, specialist referral, and sometimes emergency intervention — not exercise therapy.

Step 3: Physical Examination

Once the history is taken and red flags are ruled out, the hands-on assessment begins. This typically covers four areas.

Observation

The clinician observes you standing, sitting, and moving before touching anything, assessing spinal alignment and posture, muscle symmetry, movement quality, and how you sit, rise, and transfer.

Range of Motion

You will be asked to bend forward, backward, side-to-side, and rotate. The clinician is looking for which movements reproduce your symptoms, whether movement is guarded or restricted, and side-to-side asymmetry.

Palpation

The clinician examines your spine and surrounding muscles by hand, identifying tenderness over specific vertebral levels or joints, muscle spasm, trigger points, and areas of reduced tissue quality. Pinpointing the tender segment helps narrow the diagnosis considerably.

Neurological Examination

If nerve involvement is suspected, a neurological screen assesses the following:

Step 4: Functional Assessment

Pain doesn't exist in a vacuum. A complete spine assessment evaluates how pain is affecting your life — not just your spine. Clinicians assess sitting and standing tolerance, walking capacity, sleep quality, work capacity, and ability to perform daily tasks.

Standardised questionnaires such as the Oswestry Disability Index (for lower back), Neck Disability Index (for cervical pain), and STarT Back Screening Tool may be used to quantify disability and track progress objectively over the course of treatment.

Step 5: Diagnostic Imaging — When Is It Actually Needed?

This is one of the most misunderstood areas of spine care. Most people with back pain do not need imaging straight away — and early, indiscriminate scanning can actually lead to worse outcomes by identifying age-related changes that are clinically irrelevant and creating unnecessary anxiety.

Imaging is indicated when red flags are present, symptoms have not improved after 6–8 weeks of appropriate conservative treatment, neurological deficits are present or worsening, or surgical treatment is being considered.

Choosing the right scan

X-ray — Best for fractures, alignment abnormalities, degenerative changes, scoliosis. Cannot visualise soft tissues.

MRI (Gold Standard for Soft Tissue) — Best for disc herniations, nerve compression, spinal cord assessment, ligament injuries. Preferred when neurological symptoms are present.

CT Scan — Best for bony detail — fractures, bony stenosis, post-surgical assessment. Higher radiation exposure; not a first-line choice.

Common Diagnoses Identified Through Spine Assessment

When Should You Get Your Spine Assessed?

Don't wait until pain becomes chronic. Seek assessment if:

• Pain has lasted more than 2 weeks without improvement
• Pain is spreading into your arms or legs
• You have numbness, tingling, or weakness anywhere
• Pain is significantly affecting your sleep, work, or daily function
• You have any of the red flag symptoms listed above

Early assessment leads to earlier diagnosis, faster treatment, and significantly better long-term outcomes. Chronic spine pain is far harder to treat than acute pain — and in many cases, chronicity is preventable.

Key Takeaways

• Spine pain assessment is a systematic, multi-step process — not a single scan
• Patient history is the most powerful diagnostic tool available
• Red flag screening is non-negotiable and must happen before any other assessment
• Imaging is not always necessary and should be guided by clinical findings
• Functional assessment captures the real-world impact of pain on your life
• Early, accurate assessment prevents acute pain from becoming chronic disability

Tags: Spine Pain Assessment · Back Pain Diagnosis · Neck Pain Physiotherapy · Lower Back Pain Treatment · Herniated Disc Symptoms · Red Flags Back Pain · MRI for Back Pain · Lumbar Pain Physiotherapy