Red Flags in Physiotherapy: A Screening Checklist by Body Region (2026)

Every physiotherapist has had the moment: a patient walks in with "just back pain," and something doesn't quite fit. The history is off. The pain pattern is weird. The neuro exam throws up something unexpected.

Red-flag screening isn't about being paranoid. It's about having a mental checklist that runs in the background of every subjective, so that when something genuinely dangerous shows up, you catch it instead of treating around it for six sessions.

Here's the working checklist — organised by body region — that most UK physio services now teach in their induction.

The universal red flags (apply to every patient)

Before you get to region-specific, these apply to everyone:

• Unexplained weight loss (more than 5kg in 3 months without trying)
• Night pain that wakes them from sleep and isn't positional
• Fever, night sweats, or general unwellness
• History of cancer (especially breast, prostate, lung, thyroid, renal — these metastasise to bone)
• Age at onset: first-ever severe pain under 20 or over 55
• Progressive neurological deficit
• Recent significant trauma (or minor trauma in someone with osteoporosis or long-term steroid use)
• IV drug use, recent infection, immunosuppression

If two or more of these stack up, slow down. Document carefully. Consider onward referral before you treat.

Cervical spine

The big concerns are vascular (cervical artery dysfunction), cord (myelopathy), and instability.

Ask about and look for:

• 5 Ds and 3 Ns — dizziness, drop attacks, diplopia, dysarthria, dysphagia, nausea, numbness, nystagmus
• Sudden onset severe headache, especially "worst headache of my life"
• Upper motor neuron signs — hyperreflexia, positive Hoffmann's, positive Babinski, clonus
• Bilateral hand numbness or clumsiness (dropping things, struggling with buttons)
• Gait disturbance alongside neck pain
• History of rheumatoid arthritis or Down syndrome (craniocervical instability)
• Recent neck manipulation or trauma with new neuro symptoms

Red-flag cervical presentations go to A&E or GP same-day, not to your next appointment.

Thoracic spine

Thoracic pain is the region where serious pathology is most often missed, because mechanical thoracic pain is relatively uncommon in the first place.

• Chest pain with exertion — cardiac until proven otherwise
• Pain radiating to the jaw, left arm, or between shoulder blades with autonomic symptoms
• Band-like pain around the chest with neurological signs below the level (cord compression)
• Severe mid-thoracic pain in an older patient — consider vertebral fracture or metastasis
• Shortness of breath out of proportion to the pain
• Constant, unremitting pain that doesn't change with position

Thoracic = high suspicion. Treat cautiously.

Lumbar spine

The classic area — and the one where cauda equina gets missed.

Cauda equina screening (ask every lumbar patient):

• Saddle anaesthesia or paraesthesia
• Urinary retention or incontinence (new)
• Faecal incontinence or loss of anal tone
• Bilateral leg weakness or sciatica
• Sexual dysfunction (new)

Any one of these = A&E today. Not tomorrow. Today.

Other lumbar red flags:

• Progressive lower-limb neurological deficit
• Thoracolumbar pain with systemic symptoms
• Abdominal aortic pulsation with back pain in an older patient (AAA)

Shoulder

Shoulder is tricky because cardiac, diaphragmatic, and apical lung issues can all refer here.

• Left shoulder pain with exertion — cardiac
• Right shoulder pain with meal-related symptoms — gallbladder or diaphragmatic
• Unexplained wasting of shoulder girdle out of proportion to disuse
• Mass or lump in the shoulder region
• Shoulder pain with unexplained cough or haemoptysis (Pancoast tumour)
• Sudden inability to lift the arm after trivial trauma in an older patient — consider pathological fracture

Hip

• Groin pain with limp in a child — Perthes, SCFE, septic arthritis
• Unexplained fever with hip pain — septic arthritis or osteomyelitis
• Inability to weight-bear after low-energy fall in an older patient — fracture, even with normal X-ray (consider MRI)
• Persistent night pain with groin ache in an adult — avascular necrosis, especially with steroid use or alcohol history
• Hip pain with unexplained weight loss in middle-aged adults — consider metastatic disease

Knee

• Hot, swollen, red knee with fever — septic joint until proven otherwise
• Locked knee with inability to fully extend — displaced meniscal tear, loose body
• Acute haemarthrosis within 2 hours of injury — ACL, fracture, patellar dislocation
• Child with knee pain — screen the hip (referred pain from SUFE/SCFE is classic)

Systemic red flags during the exam

Sometimes red flags show up not from what the patient says, but from what you notice:

• BP you weren't expecting (very high or low)
• Resting tachycardia
• Pallor, jaundice, unexplained bruising
• Lymphadenopathy
• Skin rash or lesions in a dermatomal pattern (shingles)
• Unexplained oedema

If it's outside your scope, document it, refer it, and don't brush past it.

How to actually use this in practice

You don't need to ask all 50+ questions on every patient. Here's the pragmatic version:

1. Every patient — screen universal red flags in the subjective (5 questions, 90 seconds).
2. By region — scan the region-specific list mentally while you take the history. If something from the list pops up, dig in.
3. If anything flags up — document it explicitly in your notes ("Red flag screen: negative for X, Y, Z. Positive for night pain — discussed onward referral."), even if you decide to treat.
4. Have a referral pathway ready — know your local A&E, your GP-MSK triage, your MSK consultant referral form. Screening is only useful if you can act on what you find.

The documentation question

A legitimate compliance question: if you don't document that you screened for red flags, did you screen for red flags?

Your notes should show, for every new patient, that you considered red flags. It doesn't need to be long. One line saying "Red flags screened — negative" + any specific concerns is enough.

If you use an AI notes tool, check that it includes red-flag screening in its SOAP output. A good one will prompt you if your subjective doesn't cover it.

A final word

Red-flag screening is about pattern recognition over time. Early in your career, use a written checklist. Five years in, it becomes automatic. Twenty years in, you'll occasionally catch something subtle that a checklist wouldn't have caught — because you've seen it once before.

Keep using the checklist anyway.

How Oris helps with this

Oris includes red-flag prompting in its SOAP note workflow — if your subjective is missing key screening questions for the region, it flags them before you finalise the note. You still make the clinical call. It just makes sure you don't forget to ask. Free on the Starter plan.