Plantar Fasciitis: Causes, Symptoms, and Effective Treatment

Plantar fasciitis is the most common cause of inferior heel pain, affecting ~10% of adults. It involves degenerative microtears and collagen disorganization at the plantar fascia origin (medial calcaneal tubercle), not primarily inflammation ("fasciosis" is more accurate). The hallmark is "first-step" pain.

Risk Factors

• Biomechanical: Pes planus (flat feet), pes cavus (high arches), limited ankle dorsiflexion (tight gastroc-soleus), overpronation.
• Load-related: Sudden increase in activity, prolonged standing/walking on hard surfaces, obesity (BMI >30).
• Footwear: Worn-out shoes, minimal arch support, high heels, barefoot on hard floors.
• Demographics: Age 40-60, female > male.
• Systemic: Diabetes, inflammatory arthritis (RA, PsA, AS).

Clinical Features

• Sharp, stabbing pain at medial heel on first steps (morning or after rest).
• Improves with activity ("warms up"), worsens with prolonged weight-bearing.
• Tenderness at medial calcaneal tubercle; may extend along medial arch.
• Pain with passive toe extension (Windlass test) or dorsiflexion + toe extension.
• No neurologic deficits (unless concurrent tarsal tunnel).

Differential Diagnosis

• Calcaneal stress fracture (squeeze test +), fat pad atrophy (diffuse central heel pain), tarsal tunnel (burning, Tinel's at medial ankle), Baxter's neuropathy (inferior calcaneal nerve), insertional Achilles tendinopathy (posterior heel), radiculopathy (S1).

Treatment: Tiered Approach

First-Line (Home-Based, 6-12 weeks)

• Load management: Reduce impact; cross-train (swim, cycle).
• Calf & plantar fascia stretching: Wall gastroc/soleus stretches 3x/day; seated plantar fascia stretch (pull toes to shin) 10x30sec.
• Ice massage: Frozen water bottle roll 5-10 min, 2-3x/day.
• OTC NSAIDs: Short course for pain flares.
• Supportive footwear: Rigid shank, cushioned heel, arch support. OTC orthoses (Powerstep, Superfeet) often equal custom.
• Night splint (Strassburg sock): Maintains dorsiflexion; improves morning pain. Adherence challenging.

Second-Line (Clinician-Guided)

• Physical therapy: Eccentric calf strengthening, foot intrinsic strengthening (toe yoga, towel scrunches), gait retraining, manual therapy.
• Custom orthotics: For significant biomechanical deviation unresponsive to OTC.
• Corticosteroid injection: Short-term relief (4-12 wks); limit 2-3/yr (fat pad atrophy, fascia rupture risk). Ultrasound-guided preferred.

Advanced/Refractory

• ESWT: Focused shockwave; 3-5 sessions. Level I evidence for chronic PF.
• PRP: Mixed evidence; may outperform steroid at 6-12 mo.
• Tenex / Topaz (percutaneous tenotomy): Minimally invasive debridement.
• Gastrocnemius recession: If isolated equinus contracture.
• Plantar fascia release: Last resort (open/endoscopic); 6-12 mo failed conservative. Lateral column instability risk.

Prevention

• Maintain healthy weight.
• Replace shoes every 300-500 miles / 6-12 months.
• Daily calf/plantar fascia mobility.
• Gradual training load progression (10% rule).

Plantar fasciitis is self-limiting in 80-90% with consistent conservative care. The key is early, persistent loading management and stretching—not passive rest alone.