Iselin Disease: Pediatric Heel Pain on Outside of Foot

Feature	Iselin Disease	5th Metatarsal Avulsion Fracture	Jones Fracture
Age group	8–15 years (growing child)	Any age; most common adults	Young adults and athletes
Onset	Gradual; weeks of activity pain	Acute; specific inversion event	Acute; foot inversion/plantarflexion
Trauma required?	No — overuse / traction mechanism	Yes — ankle sprain-type mechanism	Yes — specific mechanism
Bruising	None or minimal	Lateral foot bruising within 24 hrs	Lateral foot bruising
X-ray finding	Normal apophysis; growth plate PARALLEL to shaft	Fracture line PERPENDICULAR to shaft; Zone 1	Fracture line; Zone 2–3 (at or distal to tuberosity)
Weight-bearing	Painful but possible	Painful; may limp	Very painful to impossible
Treatment	Activity modification; supportive shoes; padding; boot if severe	Boot or cast 4–6 weeks; non-weight-bearing	Non-weight-bearing 6–8 weeks; surgical fixation in athletes
Prognosis	Excellent — resolves with skeletal maturity	Good with proper immobilization	High non-union risk; careful management needed

Iselin Disease Treatment	Indication	Duration	Outcome
Activity modification only	Mild cases; pain ≤4/10; can continue sport with discomfort	4–8 weeks	90% resolve within 6–8 weeks
Lateral padding + supportive shoe	All cases — prevents direct pressure aggravation	Throughout symptomatic period	Significant comfort improvement
Walking boot (2–4 weeks)	Severe pain; unable to participate; multiple sports seasons affected	2–4 weeks then gradual return	Faster acute resolution; same long-term outcome
Ice + NSAIDs	Acute pain management only	1–2 weeks; not long-term	Symptomatic relief; not curative
No treatment / natural history	Mild, non-limiting cases	Resolves with skeletal maturity (within months to 2 years)	100% long-term resolution

Quick answer: Iselin Disease is a clinical condition that responds to evidence-based treatment when caught early. Symptoms include pain, swelling, and altered function. Diagnosis requires clinical exam, often imaging. Treatment ladder: conservative care first (4-6 weeks), then targeted interventions if needed. Call (810) 206-1402.

What Is Iselin Disease?

Iselin disease is traction apophysitis (inflammation of the growth plate) at the base of the 5th metatarsal – the outer side of the foot. Different from Severs disease (heel growth plate apophysitis). Affected age range: 9-14 years old typically; coincides with growth spurts and athletic activity. Self-limiting condition that resolves when growth plate closes (around age 14-16) but causes significant pain during active phase.

Causes

Mechanism: Repetitive pull of the peroneus brevis tendon on the apophysis (growth plate) at the base of the 5th metatarsal causes inflammation. Most common in athletes with: soccer (constant cutting and kicking); basketball (jumping, cutting); gymnastics; dance; running on hard surfaces; football. Risk factors: Sudden activity increase; new sport season; growth spurts (bones grow faster than muscles); tight calves and peroneal muscles.

Symptoms

1. Pain on OUTSIDE of foot (lateral) at the base of 5th metatarsal. 2. Tenderness when pressing directly on the bony prominence at the outside-back of the foot. 3. Pain WORSE with activity (sports, running); BETTER with rest. 4. Mild swelling sometimes present. 5. Visible bony prominence may develop at the base of 5th metatarsal. 6. Limp may be apparent during games or after practice. 7. Often bilateral if both feet are equally stressed.

Diagnosis

Clinical exam: Tenderness directly on the apophysis at base of 5th metatarsal; pain with resisted eversion (turning foot outward against resistance); pain with passive inversion stretch. X-rays: May show widened or fragmented apophysis (growth plate); rule out fractures (especially Jones fracture or 5th metatarsal avulsion fracture). Important to distinguish from Jones fracture or 5th metatarsal avulsion fracture – similar location but different treatment.

Conservative Treatment (Most Cases)

1. Activity modification: Reduce or stop sports temporarily; can usually continue light activities. 2. Ice: 15 minutes 3x daily during flares. 3. NSAIDs: Ibuprofen 400-600mg as needed for pain (with food). 4. Stretching: Daily peroneal and calf stretching. 5. Custom orthotics: Lateral wedge can help shift pressure off 5th metatarsal. 6. Supportive shoes: Avoid worn-out cleats or athletic shoes. 7. Heel cups: Sometimes helpful for combined symptoms. Most cases improve in 6-12 weeks.

When to Modify Sports Activity

Stop sports if: Severe pain limiting normal walking; visible swelling or warmth; pain not improving with rest. Modify (reduce intensity): Pain only after activity; mild discomfort during play. Continue with monitoring: Mild occasional pain; improving with conservative care. Total rest typically not needed – relative rest with activity modification usually sufficient.

Recovery Timeline

Acute symptom improvement: 2-4 weeks with proper conservative care. Return to full sports: 6-12 weeks; sometimes longer if compliance issues. Final resolution: Symptoms self-resolve when growth plate closes (typically age 14-16). Recurrence risk: High during growth spurts or new sport seasons until apophysis closes.

Iselin vs Other Foot Pain in Children

Iselin disease: Outside of foot, base of 5th metatarsal, usually athletes ages 9-14, growth plate inflammation. Severs disease: Heel pain, growth plate of calcaneus, similar age range. Stress fracture: Localized pinpoint pain on bone, may need MRI for diagnosis. Jones fracture: Acute injury at 5th metatarsal base; serious with high nonunion rate. Sinding-Larsen-Johansson: Knee growth plate, similar mechanism but different location.

When to See a Podiatrist

See us if: persistent outer foot pain in young athlete; pain not improving with rest in 2-3 weeks; visible swelling; pain limits sports significantly; uncertain about diagnosis (could be Jones fracture). Early evaluation ensures correct diagnosis and prevents complications. Same-week appointments available for pediatric patients. Schedule online.

Long-Term Considerations

After growth plate closes (age 14-16), symptoms resolve completely in most cases. However, some patients may have: Persistent prominent 5th metatarsal base; mild residual tenderness; continued need for supportive shoes during sports. Custom orthotics may be needed long-term in some cases. Most patients return to all sports without lifelong limitations.

Frequently Asked Questions About Iselin Disease

What is Iselin disease?

Inflammation of the growth plate at the base of the 5th metatarsal (outside of foot). Common in adolescent athletes (ages 9-14), especially soccer players, gymnasts, and basketball players.

How long does Iselin disease last?

Acute symptoms improve in 2-4 weeks with proper care. Return to full sports 6-12 weeks. Final resolution when growth plate closes (typically age 14-16).

Can my child play sports with Iselin disease?

Modified activity often acceptable with mild pain. Stop sports temporarily for severe pain or swelling. Custom orthotics and supportive shoes help during athletic activities.

How is Iselin disease different from a fracture?

Iselin: gradual onset, growth plate inflammation in adolescents, conservative treatment. Jones or 5th metatarsal fractures: acute injury, bone breakage, may need walking boot or surgery. Distinguish with X-ray.

Will Iselin disease heal on its own?

Yes – it resolves when growth plate closes (age 14-16). Treatment focuses on managing symptoms and preventing significant time off sports. Most cases improve with conservative care.

What treatment does Iselin disease need?

Conservative: activity modification, ice, NSAIDs, stretching, supportive shoes, sometimes custom orthotics with lateral wedge. Surgery rarely needed.

When should I take my child to a podiatrist for foot pain?

See us if foot pain persists 2-3 weeks despite rest, prevents sports participation, has visible swelling, or you are unsure of diagnosis. Pediatric appointments available same week.

Related Resources from Balance Foot & Ankle

• Severs Disease
• Foot Pain Causes Children
• Pediatric Podiatry
• Jones Fracture Recovery

Frequently Asked Questions