Plantar fasciitis

Plantar fasciitis is the most common cause of heel pain in adults, accounting for approximately 15% of all foot complaints presenting to primary care and affecting around 10% of the population at some point in their lifetime. It is characterised by inferior heel pain arising from degenerative changes at the origin of the plantar fascia at the medial calcaneal tuberosity. Despite its name, plantar fasciitis is predominantly a degenerative enthesopathy (plantar fasciopathy) rather than a primary inflammatory condition; the histological finding is collagen degeneration and angiofibroblastic hyperplasia rather than acute inflammation. The condition is common in both sedentary individuals (particularly overweight middle-aged adults) and active athletes (runners, dancers). The hallmark symptom is sharp inferior heel pain with the first steps in the morning or after rest, typically improving with activity. Over 80% of patients recover with conservative management within 12 months.

Plantar fasciitis results from cumulative microtears at the plantar fascia origin that exceed the tissue's capacity for repair, producing a degenerative enthesopathy (fasciopathy) rather than a classical inflammatory condition.

Degenerative Mechanisms

• Collagen degeneration — repetitive tensile and compressive loading at the medial calcaneal tuberosity causes microtears within the plantar fascia; histological examination reveals angiofibroblastic hyperplasia, collagen degeneration and disorganisation, and neovascularisation without significant inflammatory infiltrate; the process is analogous to tendinosis rather than tendinitis
• Windlass mechanism dysfunction — the plantar fascia is a key component of the windlass mechanism: dorsiflexion of the toes tightens the fascia, raises the longitudinal arch, and supinates the foot during push-off; altered foot biomechanics (pes planus, pes cavus, reduced ankle dorsiflexion) increase stress at the fascial origin; excessive pronation is a significant contributor
• Risk factors — obesity and overweight (BMI >30) significantly increase plantar fascia load; prolonged standing; reduced ankle dorsiflexion range (tight Achilles-gastrocnemius-soleus complex); sudden increase in training load; hard surfaces; poor footwear support; both pes planus and pes cavus increase fascial stress; leg length discrepancy; prolonged walking or standing occupations

Plantar fasciitis has a characteristic clinical presentation that allows confident diagnosis in the majority of cases without imaging. The diagnosis is primarily clinical.

History

• First-step pain (post-static dyskinesia) — sharp, stabbing heel pain with the first few steps in the morning or after prolonged sitting or rest; this is the hallmark symptom; pain typically improves after 5–10 minutes of walking as the fascia warms up and elongates; may worsen again after prolonged activity
• Location — inferior heel pain; typically at the medial aspect of the calcaneal tuberosity (plantar fascia origin); may radiate proximally along the plantar fascia; rarely involves the central heel pad
• Aggravating factors — barefoot walking (particularly on hard floors); first steps in the morning; prolonged standing; stair climbing; running; walking in unsupportive footwear; end-of-day activity after prolonged standing
• Duration and natural history — symptoms often present for weeks to months before presentation; gradual onset in most cases; acute presentation can occur with sudden overload; over 80% resolve within 12 months with conservative management; a minority develop chronic plantar fasciopathy

Examination Findings

• Point tenderness — maximal tenderness on direct palpation of the medial calcaneal tuberosity (plantar fascia origin); this is the most sensitive physical finding; tenderness along the plantar fascia mid-substance may also be present; central heel pad tenderness suggests fat pad pathology rather than fasciitis
• Windlass test — passive dorsiflexion of the great toe (which tightens the plantar fascia via the windlass mechanism) reproduces heel pain; sensitivity approximately 32%, specificity 100%; highly specific when positive
• Ankle dorsiflexion — assess with knee extended (gastrocnemius) and knee flexed (soleus); reduced dorsiflexion (<10 degrees with knee extended) indicates tight gastrocnemius-soleus complex — a modifiable risk factor; the Silfverskiöld test differentiates gastrocnemius from soleus tightness
• Foot posture — assess for pes planus (flat foot), pes cavus (high arch), and hindfoot valgus; excessive pronation increases plantar fascia tensile load

Plantar fasciitis is a clinical diagnosis. Investigations are not required for typical presentations. Imaging and blood tests are used to exclude differential diagnoses or guide management in atypical or refractory cases.

• Essential
  X-ray heel (lateral view)

  Not required for typical clinical presentation. Indicated when: atypical features present, symptoms not improving at 6 weeks, bony injury suspected. Plantar heel spur visible in 50% of plantar fasciitis patients but is not diagnostic — also present in 15–25% of asymptomatic individuals; spur reflects the site of fascial traction rather than the pain generator. Useful to exclude calcaneal stress fracture (periosteal reaction), bone tumour, or other bony pathology. Item 57706.
• Recommended
  Ultrasound plantar fascia

  Confirms diagnosis and guides injection or shockwave therapy. Findings: plantar fascia thickness >4 mm (normal <4 mm) at calcaneal origin; hypoechoic signal; loss of fibrillar pattern; periosteal reaction. Also assesses for partial tear and excludes plantar fibroma. Dynamic ultrasound useful to assess windlass mechanism. Guides needle placement for corticosteroid injection. Item 55054.
• Specialised
  MRI foot

  Indicated for atypical presentations, suspected calcaneal stress fracture (bone marrow oedema on STIR sequences), tarsal tunnel syndrome, or surgical planning. Not required for routine plantar fasciitis. Demonstrates plantar fascia thickening, signal abnormality, and bone marrow oedema at insertion. Item 63560.
• Specialised
  Inflammatory markers and HLA-B27

  Indicated when seronegative spondyloarthropathy is suspected: bilateral heel pain, young patient, associated back pain, morning stiffness >1 hour, inflammatory arthritis, skin or eye involvement. ESR, CRP, HLA-B27, and rheumatology referral if enthesitis-pattern disease suspected.

Plantar fasciitis is stratified by duration and treatment response to guide escalation of care.

Analgesia provides symptomatic relief while the natural healing process occurs. Corticosteroid injection provides short-term pain relief but does not alter the underlying disease course. NSAIDs have limited evidence for plantar fasciitis given the degenerative rather than inflammatory nature of the condition.

Conservative management is the cornerstone of plantar fasciitis treatment and is effective in over 80% of patients within 12 months. The most evidence-supported interventions are plantar fascia and calf stretching, load modification, and supportive footwear.

Stretching Programs

• Plantar fascia stretch — cross-legged seated position; grasp the toes and dorsiflex them to feel a stretch along the plantar fascia; hold 30 seconds; repeat 3 times; perform first thing in the morning before weight-bearing and after periods of rest; this is the single most evidence-supported intervention for plantar fasciitis; shown to be more effective than Achilles stretching alone in RCTs
• Calf stretching — gastrocnemius stretch (knee extended, foot dorsiflexed against wall); soleus stretch (knee flexed); hold 30 seconds each; 3 repetitions; twice daily; reduces plantar fascia loading by improving ankle dorsiflexion range; targets the primary modifiable biomechanical risk factor
• Intrinsic foot muscle strengthening — towel scrunches, marble pick-up, short foot exercises; strengthens the intrinsic foot musculature supporting the plantar arch; adjunct to stretching

Footwear and Orthoses

• Supportive footwear — advise patients to avoid barefoot walking on hard surfaces (particularly in the morning); shoes with cushioned heel and good arch support; replace worn footwear; avoid flat, unsupportive footwear (flip-flops, ballet flats); supportive slippers or orthotics to be worn immediately on rising in the morning
• Heel pads and prefabricated orthotics — silicone or cushioned heel pads provide immediate symptom relief; prefabricated arch support orthotics (available over-the-counter) are effective and cost-efficient; custom orthotics appropriate for complex biomechanical contributors but not superior to prefabricated orthotics for most patients
• Night splints — hold foot in neutral dorsiflexion during sleep; maintain plantar fascia and Achilles in a lengthened position overnight; evidence supports use for persistent first-step morning pain; compliance is a limitation; particularly useful for morning pain that is the predominant symptom

Extracorporeal Shockwave Therapy (ESWT)

• ESWT delivers focused acoustic energy to the plantar fascia insertion, promoting tissue healing and reducing pain; strong evidence base for chronic plantar fasciitis (>3 months duration); Meta-analyses demonstrate superiority over placebo and corticosteroid injection at 12-week and 12-month follow-up; multiple sessions (typically 3–5) required; available in major Australian cities at podiatry, sports medicine, and physiotherapy clinics; not PBS-listed but ESWT is clinically recommended as second-line therapy before surgical options

Weight Management

• Obesity is a major modifiable risk factor for plantar fasciitis; even modest weight reduction (5–10% body weight) significantly reduces plantar fascia load during daily activity; weight management advice and referral to dietitian or structured weight management program is an important component of management in overweight and obese patients

Non-pharmacological management is the foundation of plantar fasciitis care. Patient education about the natural history, self-management strategies, and realistic recovery timelines is critical.

Patient Education

• Natural history — educate that plantar fasciitis is a degenerative condition that typically resolves over 12 months with consistent conservative management; the condition is not dangerous and does not lead to permanent damage with appropriate management; compliance with stretching is the most important determinant of recovery; patients should not expect immediate relief — consistent stretching over weeks to months is required
• Activity modification — reduce high-impact activity (running, jumping) during acute flare; cross-train with low-impact activity (swimming, cycling); return to impact activity gradually; avoid sudden increases in training load; barefoot walking on hard floors should be avoided especially in the morning

Physiotherapy

• Physiotherapy encompasses manual therapy (soft tissue massage of plantar fascia and calf), taping techniques (low-Dye taping for short-term load reduction), gait assessment and retraining, targeted exercise prescription, and biomechanical correction; referral is appropriate for patients not responding to first-line GP management at 6–8 weeks, for runners, or for patients with complex biomechanical contributors

Low-Dye Taping

• Low-Dye taping supports the medial longitudinal arch and reduces pronation, decreasing plantar fascia tensile load; provides effective short-term pain relief; useful during acute flares while footwear and orthotics are being sourced; applied by physiotherapist or podiatrist; patient can be taught self-application for daily use

Monitoring focuses on symptom response to conservative management, identifying patients who require escalation, and ruling out alternative diagnoses in non-responders.

Indications for Specialist Referral

• Podiatry — complex biomechanical assessment; custom orthotics; ESWT delivery; chronic refractory plantar fasciitis
• Sports medicine / physiotherapy — runners and athletes; gait retraining; return-to-sport planning; manual therapy
• Rheumatology — suspected seronegative spondyloarthropathy (bilateral heel pain, enthesitis pattern, associated inflammatory features)
• Orthopaedic surgery — chronic plantar fasciitis >12 months not responding to comprehensive conservative management; surgical release rarely required (<5% of cases)

Special considerations apply to runners, obese patients, and patients with seronegative spondyloarthropathy presenting with plantar heel enthesitis.

Runners and Athletes

• Plantar fasciitis in runners is typically associated with training load errors (sudden mileage increase), inadequate footwear, and biomechanical contributors (limited dorsiflexion, pes planus); complete cessation of running is not required but high-volume training should be reduced; pool running and cycling maintain fitness; gait retraining (cadence increase, reduced overstriding) can reduce plantar fascia loading; physiotherapy and sports medicine referral is appropriate for competitive runners; return to full training after pain resolves with gradual volume increase

Obese and Overweight Patients

• Obesity is the strongest modifiable risk factor for plantar fasciitis and chronic heel pain; weight loss of 5–10% body weight significantly reduces plantar fascia load during daily activities; address obesity as a primary treatment target through dietary modification, physical activity (low-impact initially), and referral to a structured weight management program or dietitian; bariatric surgery referral for morbid obesity refractory to conservative weight management; heel cushioning and supportive footwear are particularly important in this group

Seronegative Spondyloarthropathy

• Enthesitis (inflammation at tendon and ligament insertions) is a cardinal feature of seronegative spondyloarthropathies including ankylosing spondylitis, psoriatic arthritis, and reactive arthritis; plantar fascial enthesitis may be the presenting feature; bilateral heel pain, associated back pain, morning stiffness >1 hour, inflammatory eye or bowel disease, or skin psoriasis should prompt evaluation; HLA-B27, CRP, ESR, and rheumatology referral; management differs from mechanical plantar fasciitis and requires disease-modifying therapy

Stewardship in plantar fasciitis focuses on avoiding unnecessary imaging, limiting corticosteroid injections, supporting evidence-based non-pharmacological interventions, and recognising when imaging or specialist referral is genuinely indicated.

GP Role

• Diagnose clinically — characteristic first-step pain, medial calcaneal tenderness, positive windlass test; no imaging required for typical presentation
• Initiate evidence-based first-line care — plantar fascia and calf stretching protocol; supportive footwear and heel pads; activity modification; weight management; analgesia
• Review and escalate appropriately — 6–8 week review; physiotherapy referral if not improving; corticosteroid injection for persistent pain beyond 3 months (maximum 2); ESWT referral for chronic cases
• Screen for inflammatory causes — investigate bilateral heel pain or inflammatory features; HLA-B27 and rheumatology referral if enthesitis-pattern suspected

Follow-up in plantar fasciitis is symptom-guided. Most patients improve with consistent conservative management over 6–12 months. Prevention of recurrence centres on ongoing stretching, appropriate footwear, weight management, and gradual training load progression.

• Riddle DL, Schappert SM — Volume of ambulatory care visits and patterns of care for patients diagnosed with plantar fasciitis; Foot Ankle Int 2004
• Digiovanni BF et al. — Plantar fascia-specific stretching versus nonspecific stretching for chronic heel pain; J Bone Joint Surg Am 2006
• Rompe JD et al. — Shock wave therapy for chronic plantar fasciitis; Am J Sports Med 2009
• Landorf KB, Menz HB — Plantar heel pain and fasciitis; BMJ Clin Evid 2008
• Hawke F, Burns J — Understanding the nature and mechanism of foot pain; J Foot Ankle Res 2009
• Therapeutic Guidelines: Musculoskeletal — Plantar fasciitis and heel pain; available via eTG complete
• Australian Rheumatology Association — Spondyloarthropathy and enthesitis management guidelines
• RACGP — Red Book: Musculoskeletal conditions in primary care; 2022 edition