Polymyalgia Rheumatica (PMR): How to Diagnose and Treat in General Practice
A practical guide for Australian GPs on diagnosing and managing polymyalgia rheumatica (PMR), including key history features, red flags for giant cell arteritis, investigations, steroid treatment and tapering strategies.
Polymyalgia Rheumatica (PMR): How to Diagnose and Treat in General Practice
Polymyalgia rheumatica (PMR) is a common inflammatory condition in older adults.
Yet it is frequently misdiagnosed.
Patients are often told:
- “It’s just ageing.”
- “It’s osteoarthritis.”
- “Your muscles are tight.”
But PMR is not mechanical pain.
It is an inflammatory rheumatic disease, and early recognition can dramatically improve symptoms and prevent complications.
PMR is one of the few conditions in medicine where patients can improve dramatically within days of treatment.
For overview resources see:
- NHS – Polymyalgia Rheumatica
- Arthritis Australia - Polymyalgia Rheumatica
- Mayo Clinic – Polymyalgia Rheumatica
Table of Contents
- What Is Polymyalgia Rheumatica?
- Step 1: Recognise the Classic Presentation
- Step 2: Screen for Giant Cell Arteritis (GCA)
- Step 3: Physical Examination
- Step 4: Investigations
- Step 5: Differential Diagnosis
- Step 6: Treatment
- Step 7: Steroid Tapering
- Step 8: Monitoring Long-Term Steroid Therapy
- When to Refer
- Red Flags Suggesting Giant Cell Arteritis
- Practical Summary
- Structured Follow-Up
- Final Thoughts
- Explore AI Tools for Structured Rheumatology Consultations
What Is Polymyalgia Rheumatica?
Polymyalgia rheumatica is an inflammatory condition affecting proximal muscle groups, particularly:
- shoulder girdle
- hip girdle
- neck
It typically occurs in patients:
Older than 50 years (most commonly over 60).
Women are affected more frequently than men.
The condition is closely associated with giant cell arteritis (GCA), which can lead to permanent vision loss if untreated.
Clinical overview:
Arthritis Australia - Polymyalgia Rheumatica
Step 1: Recognise the Classic Presentation
Diagnosis relies heavily on pattern recognition.
Typical Symptoms
Patients commonly report:
- bilateral shoulder pain
- hip girdle stiffness
- marked morning stiffness (>45–60 minutes)
- difficulty getting out of bed
- difficulty lifting arms (e.g. combing hair)
- difficulty rising from a chair
- fatigue and malaise
Important clinical point:
The weakness in PMR is usually due to pain and stiffness — not true muscle weakness.
This helps differentiate PMR from inflammatory myopathies.
Step 2: Screen for Giant Cell Arteritis (GCA)
This is one of the most important steps in the consultation.
PMR and giant cell arteritis frequently overlap.
Always ask about:
- new headache
- scalp tenderness
- jaw claudication
- visual disturbance
- transient vision loss
- diplopia
If any of these symptoms are present:
Urgent same-day assessment and high-dose corticosteroids are required.
Vision loss from GCA can occur suddenly and may be permanent.
Clinical guidance:
Arthritis Australia - Giant Cell Arteritis
Step 3: Physical Examination
Physical findings may be subtle.
Common findings include:
- restricted active shoulder movement
- pain with shoulder abduction
- normal muscle strength when pain is controlled
- absence of joint swelling
- no neurological deficit
One important clue is the mismatch between mild examination findings and severe functional limitation.
Step 4: Investigations
PMR is primarily a clinical diagnosis supported by laboratory findings.
Initial investigations may include:
- ESR
- CRP
- full blood examination
- liver function tests
- electrolytes and renal function
- CK (to exclude myositis)
- thyroid function tests
Typical Laboratory Findings
| Test | Typical Result |
|---|---|
| ESR | Elevated |
| CRP | Elevated |
| CK | Normal |
| FBE | Sometimes mild normocytic anaemia |
If CK is elevated, consider inflammatory myopathy instead.
For broader rheumatology investigation principles see:
Australian Prescriber - Utility of common investigations for suspected inflammatory arthritis in adults
Step 5: Differential Diagnosis
Several conditions can mimic PMR.
Rotator Cuff Disease
Usually:
- unilateral
- mechanical pattern
- worse with movement
Rheumatoid Arthritis
Often includes:
- small joint involvement
- joint swelling
- positive rheumatoid markers
Polymyositis
Key features:
- true muscle weakness
- raised CK
Fibromyalgia
Typical features:
- widespread pain
- fatigue
- normal inflammatory markers
Malignancy
Always consider when patients have:
- unexplained weight loss
- atypical symptoms
- poor steroid response
Step 6: Treatment
First-Line Treatment
PMR is treated with low-dose oral corticosteroids.
Typical starting dose:
- Prednisolone 12.5–25 mg daily
Most patients experience dramatic improvement within 48–72 hours.
A rapid steroid response strongly supports the diagnosis of PMR.
If symptoms do not improve, reconsider the diagnosis.
Step 7: Steroid Tapering
PMR treatment usually requires gradual steroid tapering.
Example tapering approach (individualise):
- Start prednisolone 15 mg daily
- Maintain until symptoms controlled
- Reduce by 2.5 mg every 2–4 weeks
- Once at 10 mg, taper more slowly
- Gradually reduce over 12–24 months
Relapses are common.
Temporary dose escalation may be required during flares.
Step 8: Monitoring Long-Term Steroid Therapy
Long-term corticosteroid therapy carries significant risks.
Monitor patients for:
- hypertension
- hyperglycaemia
- weight gain
- mood changes
- osteoporosis
Consider preventative measures such as:
- calcium and vitamin D supplementation
- osteoporosis risk assessment
- bisphosphonate therapy if indicated
Bone protection is an important part of PMR care.
Guidance:
Australian Prescriber - Corticosteroid-induced osteoporosis and fractures
When to Refer
Rheumatology referral is recommended when:
- diagnosis is uncertain
- symptoms are atypical
- steroid response is poor
- relapses are frequent
- giant cell arteritis is suspected
Urgent referral is required if GCA is suspected.
Red Flags Suggesting Giant Cell Arteritis
Key warning features include:
- new temporal headache
- scalp tenderness
- jaw claudication
- visual symptoms
- systemic illness
- markedly elevated ESR/CRP
Start high-dose steroids immediately if GCA is suspected.
Do not wait for temporal artery biopsy.
Practical Summary
| Feature | PMR |
|---|---|
| Age | >50 years |
| Pain location | Bilateral shoulders and hips |
| Morning stiffness | >45–60 minutes |
| Inflammatory markers | Elevated ESR/CRP |
| CK | Normal |
| Steroid response | Rapid improvement |
PMR diagnosis relies heavily on pattern recognition.
Structured Follow-Up
Regular follow-up helps manage relapse and steroid complications.
Suggested review schedule:
| Time | Focus |
|---|---|
| 2–4 weeks | steroid response |
| 3 months | tapering progress |
| 6–12 months | relapse monitoring |
PMR often requires long-term management and monitoring.
Final Thoughts
Polymyalgia rheumatica is common in older adults.
It is often:
- missed
- misdiagnosed
- mistaken for mechanical pain
Yet it is highly treatable when recognised early.
A structured consultation should include:
- pattern-based history
- screening for giant cell arteritis
- inflammatory marker testing
- appropriate steroid treatment
- gradual tapering
- monitoring steroid complications
When managed correctly, many patients experience dramatic improvement in quality of life.
Explore AI Tools for Structured Rheumatology Consultations
If you want to structure inflammatory and chronic disease consultations more efficiently:
- Explore the GPCCMP Generator
- Try the AI Agent for GPs
- Access mental health planning tools via the MHCP Generator
- View the full workflow suite on the Caredevo Offer Page
- Read more insights on the Caredevo Blog
Next step
See how AI can help you structure complex inflammatory and chronic disease consultations in general practice.