One-liner#
Adult/geriatric approach to ankle pain: distinguish sprain vs fracture, screen for tendon rupture and infection/crystal arthritis, and guide initial outpatient management (including when to image).
Quick nav#
Red flags / send to ED#
- Open fracture, gross deformity, or suspected dislocation
- Neurovascular compromise: cool/pale foot, diminished pulses, worsening numbness/weakness
- Suspected septic joint: fever/systemic illness plus hot, swollen ankle with severe pain on any motion
- Suspected Achilles rupture: sudden “pop” with inability to plantarflex/push off (urgent ortho pathway)
- Severe pain out of proportion, rapidly worsening swelling, or compartment syndrome concern (rare)
Key history#
- Injury mechanism: inversion/eversion, fall, twist; ability to bear weight immediately and now
- Location: lateral ligaments, medial malleolus/deltoid, posterior ankle/Achilles, midfoot
- Timing of swelling/bruising; prior sprains/instability
- Infection/crystal clues: fever, redness, rapid onset swelling, prior gout/pseudogout, recent illness
- Risk factors: diabetes/neuropathy (Charcot), immunosuppression, anticoagulants
- Footwear/activity; new training or overuse
Focused exam#
- Inspect swelling/ecchymosis; palpate malleoli, base of 5th metatarsal, navicular, Achilles insertion
- ROM; pain with passive ROM (joint concern); squeeze test/external rotation test if high ankle sprain suspected
- Ligament exam as tolerated: anterior drawer/talar tilt; tenderness over ATFL/CFL
- Achilles: Thompson test, palpate gap, compare resting plantarflexion
- Neurovascular: pulses, cap refill, sensation; assess weight-bearing gait if safe
Differential (quick pattern recognition)#
Common/likely (outpatient)#
| Diagnosis | Keywords patients use | Key clues | Focused exam clues | Initial next step |
|---|
| Lateral ankle sprain (ATFL/CFL) | “Rolled it,” “twisted,” swelling outside | Inversion injury; can sometimes bear weight | Tender lateral ligaments; instability tests painful | Functional rehab, brace, early ROM/strengthening |
| High ankle sprain (syndesmotic) | “Pain above ankle,” “hurts to rotate” | External rotation injury; slow recovery | +squeeze/external rotation tests | Consider imaging; boot/limited weight-bearing; early referral if severe |
| Ankle fracture | “Can’t walk,” focal bone pain | Trauma; inability to bear weight | Bony tenderness (malleoli/navicular/5th metatarsal) | X-ray per Ottawa rules; immobilize |
| Achilles tendinopathy | “Stiff in morning,” posterior pain | Overuse; worse with running/jumping | Tender/thickened tendon | Load management, heel lift, eccentric program/PT |
| Acute gout/pseudogout | “Sudden,” “throbbing,” very swollen | Rapid onset; prior episodes | Warmth/effusion; pain with motion | Consider aspiration if uncertainty; anti-inflammatory therapy if appropriate |
Can’t-miss / urgent#
| Diagnosis | Keywords patients use | Key clues | Focused exam clues | Initial next step |
|---|
| Septic arthritis | “Hot,” “feels sick” | Fever/risk factors; severe pain with any motion | Warmth/effusion; pain with passive ROM | ED now; aspiration/labs/IV antibiotics |
| Achilles rupture | “Pop,” “kicked in the back of leg,” can’t push off | Sudden injury during push-off | +Thompson or palpable gap | Urgent immobilization in plantarflexion and ortho eval |
| Charcot neuroarthropathy (diabetes/neuropathy) | “Swollen warm foot,” minimal pain | Neuropathy; warmth/swelling after minor trauma | Marked warmth, deformity; reduced sensation | Same-day evaluation; immobilize/offload; imaging/referral |
Workup#
- X-ray using Ottawa ankle/foot rules:
- Ankle series if bony tenderness at posterior edge/tip of malleoli or inability to bear weight immediately and for 4 steps in clinic.
- Foot series if midfoot pain with bony tenderness at navicular/base of 5th or inability to bear weight immediately and for 4 steps in clinic.
- Consider repeat imaging or advanced imaging if persistent focal bony pain with initial negative x-ray (occult fracture).
- Aspiration if hot swollen joint and gout vs infection is unclear.
- Ultrasound/other studies only when specific alternate diagnosis suspected (e.g., DVT, tendon rupture).
Initial management#
- For sprain: early protected weight-bearing as tolerated, brace/taping, ice/compression/elevation, early ROM and strengthening.
- For suspected fracture: immobilize and image; refer based on displacement/instability.
- For overuse/tendinopathy: reduce provoking load, footwear modification, PT-based progressive loading.
- Analgesics as appropriate—see medication table below.
Analgesic options for ankle pain#
| Drug | Dose | Contraindications | Monitoring | Cost | Notes |
|---|
| Acetaminophen | 650–1000 mg q6–8h; max 3 g/day | Severe hepatic impairment | LFTs if prolonged use | $ | Safe first-line |
| Ibuprofen | 400–600 mg q6–8h with food; max 2400 mg/day | CKD, GI bleed, HF, anticoagulation | Cr, BP if prolonged | $ | Effective for acute injury; limit to 7–10 days |
| Naproxen | 250–500 mg q12h; max 1000 mg/day | Same as ibuprofen | Same as ibuprofen | $ | Convenient BID dosing |
| Diclofenac gel 1% | Apply 4 g to ankle QID | Avoid on broken skin | Minimal systemic absorption | $$ | Good for localized pain; lower systemic risk |
Gout flare treatment (if ankle gout suspected)#
| Drug | Dose | Contraindications | Monitoring | Cost | Notes |
|---|
| Naproxen | 500 mg BID × 5–7 days | CKD, GI bleed, HF | Cr if CKD risk | $ | First-line if no NSAID contraindications |
| Colchicine | 1.2 mg, then 0.6 mg 1 hour later (day 1); then 0.6 mg daily–BID | CKD (reduce dose if eGFR <30); CYP3A4 inhibitors | GI symptoms; Cr | $$ | Most effective within 24 hours of flare |
| Prednisone | 30–40 mg daily × 5 days | Uncontrolled DM, active infection | Blood glucose in diabetics | $ | Use when NSAIDs/colchicine contraindicated |
When NOT to treat as gout:
- Fever or systemic symptoms (aspirate to rule out infection)
- First presentation without prior gout diagnosis (consider aspiration)
- Uncertain diagnosis—aspiration is diagnostic
Management by diagnosis#
Lateral ankle sprain#
- Education: early movement and functional rehab reduce chronic instability; swelling can last weeks.
- Treatment: brace/ankle support, ROM (alphabet), peroneal strengthening/proprioception, gradual return to sport.
- Follow-up: 1–2 weeks if unable to bear weight or significant instability; otherwise 4–6 weeks.
High ankle sprain (syndesmotic)#
- Education: often longer recovery than lateral sprain.
- Treatment: boot and activity restriction; consider early sports/ortho referral if severe or unstable.
- Follow-up: 1–2 weeks.
Achilles tendinopathy#
- Education: avoid sudden ramp-up; recovery is load-dependent and gradual.
- Treatment: heel lift short-term, eccentric or heavy-slow resistance program, PT.
- Follow-up: 4–6 weeks.
Follow-up#
- Reassess in 1–2 weeks for suspected fracture, high ankle sprain, or inability to bear weight.
- Reassess in 4–6 weeks for typical lateral sprain/tendinopathy rehab response.
- Urgent return for worsening swelling/pain with fever, new numbness/weakness, or inability to bear weight that is not improving.
- If not improving after 4–6 weeks (or recurrent sprains/instability), escalate (formal PT, bracing strategy review, consider imaging/referral).
Patient instructions#
- Use a brace/support and walk as tolerated; avoid painful pivoting early.
- Ice 10–15 minutes at a time plus compression and elevation for swelling.
- Start gentle range of motion the first week as pain allows.
- Seek urgent care for a hot swollen ankle with fever, new numbness/weakness, or a “pop” with inability to push off.
Smartphrase snippets (optional)#
Ankle pain consistent with ____. Ottawa criteria ____. Discussed brace/rehab plan, analgesic options, and return precautions.
Related pages#
Complaint pages#
Problem pages#
- Gout — ankle gout management including flare treatment and urate-lowering therapy
- Osteoarthritis — ankle OA management
Coding/billing notes (optional)#
- Document Ottawa ankle/foot rule elements, neurovascular exam, and Achilles testing when relevant.