Plantar fasciitis
Exam Tips
- Classic OSCE clue: severe first-step pain after rest plus focal medial calcaneal tuberosity tenderness.
- A positive Windlass test supports diagnosis; ask examiner to observe pain on passive toe dorsiflexion.
- Heel spur on X-ray is common and not diagnostic of plantar fasciopathy.
- Bilateral heel enthesitis or multiple entheseal sites should trigger screening for spondyloarthritis features.
- Red flags against plantar fasciopathy include night pain, systemic upset, neurological deficits, acute trauma, or inability to weight-bear.
- For visual revision, review a foot biomechanics diagram of the windlass mechanism and plantar fascia insertion (plantar aponeurosis/calcaneal enthesis).
Definition
Plantar fasciitis (more accurately plantar fasciopathy/fasciosis) is a chronic overuse disorder of the plantar fascia origin at the medial calcaneal tuberosity, presenting as plantar heel pain. It is predominantly a degenerative enthesopathy rather than a primary inflammatory condition, with classically severe pain on first weight-bearing steps after rest.
Pathophysiology
The plantar fascia supports the medial longitudinal arch and tightens during gait (windlass mechanism), especially at push-off. Repetitive tensile loading at the calcaneal insertion causes microtears and failed healing, leading to collagen disorganisation, myxoid degeneration, increased ground substance, and sometimes calcific change. Limited ankle dorsiflexion, tight gastrocnemius-Achilles complex, and abnormal foot biomechanics (pes planus/pes cavus, overpronation) increase strain at the enthesis. Histology in chronic cases supports a degenerative fasciosis pattern rather than acute inflammatory fasciitis.
Risk Factors
- Age 40-60 years
- Overweight or obesity
- Prolonged standing, walking, or running (especially sudden training/occupational load increase)
- Poorly supportive or ill-fitting footwear
- Pes planus, pes cavus, overpronation, or limb length discrepancy
- Tight gastrocnemius/Achilles tendon (equinus) and reduced ankle dorsiflexion
- Manual/routine occupations with high time on feet
- Systemic enthesitis disorders (for example axial spondyloarthritis/psoriatic disease)
Clinical Features
Symptoms
- Insidious inferomedial heel pain, often unilateral (can be bilateral)
- Marked 'first-step' pain in the morning or after inactivity
- Pain that may ease after a few steps then recur with prolonged standing/walking/running
- End-of-day worsening after cumulative weight-bearing
- Functional limitation in work, exercise, and prolonged ambulation
Signs
- Point tenderness at the medial calcaneal tuberosity (proximal plantar fascia insertion)
- Positive Windlass test (pain reproduced by passive toe dorsiflexion with ankle stabilised)
- Reduced ankle dorsiflexion with knee extended
- Antalgic gait or compensatory gait pattern
- Biomechanical findings such as pes planus/pes cavus or tight calf-Achilles complex
Investigations
Management
Lifestyle Modifications
- Relative load modification: reduce provoking running/standing, then graded return
- Daily plantar fascia-specific and gastrocnemius-soleus stretching programme
- Footwear optimisation: cushioned heel, arch support, avoid barefoot walking on hard floors
- Taping, prefabricated orthoses or heel cups for short- to medium-term symptom control
- Weight reduction where relevant to reduce plantar loading
- Physiotherapy-led strengthening and gait/biomechanics correction
Pharmacological Treatment
Simple analgesia
- Paracetamol 1 g orally every 4-6 hours when required (maximum 4 g/24 hours)
Use as first-line analgesia where needed; lower maximum daily dose may be required in low body weight, frailty, or hepatic impairment.
NSAIDs (oral, short course if needed)
- Ibuprofen 200-400 mg orally three times daily with food (use lowest effective dose for shortest duration)
- Naproxen 250-500 mg orally twice daily
Avoid or use caution in CKD, peptic ulcer disease, heart failure, ischaemic heart disease, uncontrolled hypertension, anticoagulant use, and asthma sensitive to NSAIDs. Avoid in pregnancy (especially from 20 weeks; contraindicated in 3rd trimester). Consider PPI gastroprotection (for example omeprazole 20 mg once daily) in patients at GI risk.
NSAIDs (topical option)
- Diclofenac 1.16% gel 2-4 g applied to painful area up to four times daily
Useful when oral NSAIDs are unsuitable; avoid on broken skin and use caution with NSAID hypersensitivity.
Corticosteroid injection (specialist use, usually ultrasound-guided)
- Methylprednisolone acetate 20-40 mg with local anaesthetic (for example lidocaine 1%) as single injection
May give short-term pain relief but repeated injections raise risk of plantar fascia rupture and heel fat-pad atrophy; avoid intratendinous injection and use only after discussing risks/benefits.
Surgical / Interventional
- Extracorporeal shockwave therapy for persistent symptoms despite structured conservative treatment
- Partial plantar fasciotomy (open or endoscopic) only for severe refractory cases, typically after 6-12 months of failed non-operative care
Complications
- Persistent or recurrent heel pain with reduced activity and quality of life
- Altered gait causing secondary ankle, knee, hip, or back symptoms
- Chronic bilateral symptoms (higher risk of prolonged course)
- Treatment-related: plantar fascia rupture or heel fat-pad atrophy after corticosteroid injection
- Deconditioning and weight gain due to pain-limited mobility
Prognosis
Usually self-limiting, but recovery is often slow. Many patients improve with conservative treatment over months (commonly 3-12 months), and around 80-90% obtain meaningful relief without surgery; however, long-term cohorts show a substantial minority have persistent symptoms, especially women and people with bilateral pain.
Sources & References
🏥BMJ Best Practice(3)
✅NICE Guidelines(1)
- Plantar fasciitis[overview]
📖Textbook References(20)
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1143)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1840)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1119)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1119)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1119, 1120)[context]
- Netter F. Netter Atlas of Human Anatomy. A Systems Approach 8ed 2022.pdf(pp. 2304, 2305)[context]
- Netter F. Netter Atlas of Human Anatomy. A Systems Approach 8ed 2022.pdf(pp. 2304, 2305)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 445, 446)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 468, 469)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 674)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 446)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 468, 469)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 443, 444)[context]
- [Oxford Medical Handbooks] Ian Wilkinson, Tim Raine, Kate Wiles, Anna Goodhart, Catriona Ha - Oxford Handbook of Clinical Medicine (2017, Oxford University Press) - libgen.li.pdf(pp. 565)[context]
- [Oxford Medical Handbooks] Ian Wilkinson, Tim Raine, Kate Wiles, Anna Goodhart, Catriona Ha - Oxford Handbook of Clinical Medicine (2017, Oxford University Press) - libgen.li.pdf(pp. 554, 555)[context]
- [Oxford Medical Handbooks] Ian Wilkinson, Tim Raine, Kate Wiles, Anna Goodhart, Catriona Ha - Oxford Handbook of Clinical Medicine (2017, Oxford University Press) - libgen.li.pdf(pp. 555)[context]
- [Williams, Bailey and Love's Short Practice of Surgery] Norman Williams, Christopher Bulstrode, P Ronan O'Connell - Bailey & Love's Short Practice of Surgery 26E (2013, CRC Press) - libgen.li.pdf(pp. 542)[context]
- [Williams, Bailey and Love's Short Practice of Surgery] Norman Williams, Christopher Bulstrode, P Ronan O'Connell - Bailey & Love's Short Practice of Surgery 26E (2013, CRC Press) - libgen.li.pdf(pp. 538, 539)[context]
- [Williams, Bailey and Love's Short Practice of Surgery] Norman Williams, Christopher Bulstrode, P Ronan O'Connell - Bailey & Love's Short Practice of Surgery 26E (2013, CRC Press) - libgen.li.pdf(pp. 475, 476)[context]
- [Williams, Bailey and Love's Short Practice of Surgery] Norman Williams, Christopher Bulstrode, P Ronan O'Connell - Bailey & Love's Short Practice of Surgery 26E (2013, CRC Press) - libgen.li.pdf(pp. 541, 542)[context]