Ankle pain is one of the most common musculoskeletal complaints seen in podiatric practice — and also one of the most misdiagnosed. The ankle is a complex joint with contributions from bones, ligaments, tendons, nerves, and bursae, and pain in this region can stem from a surprising range of causes beyond the obvious sprained ankle.

At Balance Foot & Ankle in Howell and Bloomfield Township, MI, we evaluate ankle pain systematically to find the true underlying cause and create a targeted treatment plan. This guide covers the most common causes, how to tell them apart, and what effective treatment looks like for each.

Anatomy: Why Ankle Pain Is Complicated

The ankle is actually two joints working together:

• The talocrural joint — the main ankle joint where the tibia and fibula form a mortise around the talus. This allows the up-and-down motion of walking.
• The subtalar joint — below the talocrural joint, between the talus and calcaneus (heel bone). This controls side-to-side motion and foot inversion/eversion.

Surrounding these joints are four major ligament groups, three primary tendons (Achilles, peroneal, and posterior tibial), the sural and peroneal nerves, and numerous bursae. Pain can originate from any of these structures — which is why precise diagnosis matters.

Common Causes of Ankle Pain by Location

Pain Location	Most Likely Cause(s)	Key Clue
Outer (lateral) ankle	Lateral ankle sprain, peroneal tendon tear/subluxation, OCD lesion, sinus tarsi syndrome	History of inversion injury; pain with uneven ground
Inner (medial) ankle	Posterior tibial tendon dysfunction, deltoid ligament sprain, tarsal tunnel syndrome	Pain along inner arch; flatfoot progression; electric/burning sensation (nerve)
Back of ankle	Achilles tendinopathy, insertional Achilles tendinitis, Haglund’s deformity, retrocalcaneal bursitis	Pain with first steps; worse with stairs/hills; heel-counter irritation
Front of ankle	Ankle impingement (anterior or posterior), tibialis anterior tendinopathy, ankle arthritis	Pain squatting or dorsiflexing; worse going downstairs
All around ankle	Ankle arthritis, gout flare, fracture, infection, inflammatory arthritis (RA, psoriatic)	Diffuse swelling, warmth, systemic symptoms

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Ankle Sprain: The Most Common Cause

Lateral ankle sprains account for approximately 25% of all sports injuries. Even sprains are more complex than commonly understood — there are three grades:

Grade	Ligament Status	Symptoms	Return to Activity
Grade I	Stretched (microscopic tears)	Mild tenderness, minimal swelling, full weight-bearing	3-5 days with RICE
Grade II	Partial tear	Moderate swelling, bruising, pain with weight-bearing, some instability	2-6 weeks with rehabilitation
Grade III	Complete tear	Significant swelling, bruising, instability, weight-bearing often impossible	6-12+ weeks; may require surgery for athletes

Critical point: Many ankle sprains mask accompanying injuries. Up to 40% of Grade II-III sprains have an associated peroneal tendon injury, and up to 50% have a missed osteochondral lesion (OCD) of the talus — a cartilage/bone injury that doesn’t heal without specific treatment. If your ankle pain persists beyond 6 weeks after a sprain, imaging and re-evaluation are warranted.

Posterior Tibial Tendon Dysfunction (PTTD)

PTTD is the most common cause of progressive adult flatfoot and medial ankle pain. The posterior tibial tendon — which runs behind the inner ankle and supports the arch — gradually degenerates and fails, allowing the arch to collapse and the heel to roll outward.

Early PTTD (Stage I-II) responds very well to custom orthotics, supportive footwear, and physical therapy. Advanced PTTD (Stage III-IV) may require surgical reconstruction. Early intervention is critical — read our comprehensive guide on posterior tibial tendon dysfunction.

Achilles Tendon Pain

Pain at the back of the ankle most commonly involves the Achilles tendon complex. Three overlapping conditions are often confused:

• Noninsertional Achilles tendinopathy: Pain and thickening 2-6cm above the heel bone insertion, in the tendon’s midportion. Common in runners. Responds well to eccentric strengthening, load management, and MLS laser therapy.
• Insertional Achilles tendinitis: Pain directly at the heel bone attachment, often with a visible bump. More resistant to treatment; associated with Haglund’s deformity. Heel lifts and specialized orthotics are key.
• Achilles tendon rupture: Sudden “pop” sensation, inability to rise on toes, palpable gap in tendon. Requires urgent evaluation — surgical vs. conservative management depends on age, activity level, and gap size.

For comprehensive information, see our guide on Achilles tendinitis treatment.

Peroneal Tendon Injuries

The two peroneal tendons run behind the lateral (outer) ankle and stabilize the foot during push-off and on uneven terrain. Peroneal injuries are frequently missed because they mimic chronic lateral ankle sprains:

• Peroneal tendinopathy: Chronic outer ankle pain with swelling behind the lateral malleolus. Worsens with activity, eases with rest. Treated with rest, orthotics, physical therapy, and MLS laser.
• Peroneal tendon subluxation: The tendons slip out of their groove behind the fibula with ankle movement. Often causes a snapping sensation. May require surgical stabilization.
• Peroneal tendon tear: Longitudinal split tear most common in the peroneus brevis. Causes persistent outer ankle pain and weakness. MRI confirms diagnosis.

Ankle Arthritis

Unlike hip and knee arthritis, ankle osteoarthritis most commonly results from prior trauma (post-traumatic arthritis) rather than primary degeneration. Risk factors include previous fractures, multiple ankle sprains, osteochondral lesions, and alignment problems.

Symptoms include stiffness (especially morning stiffness), aching pain with activity, reduced range of motion, and visible joint swelling. Treatment options include:

• Custom orthotics with rocker sole modification to reduce joint stress
• Ankle-foot orthoses (AFOs) for advanced arthritis
• Intra-articular cortisone injections for flares
• Hyaluronic acid (viscosupplementation) for mild-moderate arthritis
• PRP (platelet-rich plasma) injections — emerging evidence
• Ankle arthroscopy for joint debridement
• Total ankle replacement or ankle fusion for end-stage disease

Tarsal Tunnel Syndrome

Tarsal tunnel syndrome compresses the posterior tibial nerve as it passes through the tarsal tunnel behind the inner ankle — the foot equivalent of carpal tunnel syndrome in the wrist. It causes burning, tingling, and electric pain along the inner ankle, arch, and toes. Read our complete guide on tarsal tunnel syndrome.

When Is Ankle Pain an Emergency?

Symptom	Possible Cause	Action
Ankle pain + inability to bear any weight	Fracture	ER or urgent podiatric evaluation
Ankle pain + sudden “pop” + inability to rise on toes	Achilles rupture	Urgent evaluation — time-sensitive treatment decision
Ankle pain + fever + warmth + redness	Septic arthritis or gout	ER if high fever; urgent podiatric evaluation if afebrile
Ankle pain + calf pain + swelling	Deep vein thrombosis (DVT)	ER immediately — DVT is life-threatening
Ankle pain in a diabetic patient + swelling + warmth	Charcot neuroarthropathy	Same-day evaluation — non-weight-bearing critical

Diagnosis: What to Expect at Balance Foot & Ankle

When you visit our office with ankle pain, your evaluation typically includes:

• Detailed history: Onset, mechanism of injury (if any), location, aggravating/relieving factors, prior ankle injuries, systemic conditions
• Physical examination: Palpation along specific anatomical landmarks, range-of-motion testing, stability assessment (anterior drawer, talar tilt tests), gait observation, single-leg heel raise testing
• Weight-bearing X-rays: Essential for assessing bony alignment, arthritis, fractures, and coalition
• Ultrasound: Dynamic imaging that can evaluate tendons and ligaments in real time
• MRI (if indicated): For osteochondral lesions, suspected tears, soft tissue masses
• Nerve conduction studies: If tarsal tunnel syndrome or neuropathy suspected

Frequently Asked Questions

Q: How do I know if my ankle pain is a sprain or a fracture?
A: The Ottawa Ankle Rules (used in emergency medicine) suggest X-ray is needed if: you cannot bear weight for 4 steps, or there’s tenderness at the posterior tip or bottom 6cm of either malleolus. When in doubt, get an X-ray. A missed fracture is a serious problem.

Q: Why does my ankle still hurt months after a sprain?
A: Chronic pain after a sprain often indicates an under-treated injury. Common causes include residual ligament instability, peroneal tendon tear, osteochondral lesion (cartilage injury), sinus tarsi syndrome, or inadequate rehabilitation. A repeat evaluation with MRI is usually appropriate after 6-8 weeks of non-resolution.

Q: Can custom orthotics help ankle pain?
A: Yes, for many causes. Orthotics address biomechanical contributors — overpronation, PTTD, instability — by controlling foot and ankle alignment during gait. They’re especially effective for PTTD, chronic ankle instability, and ankle arthritis.

Q: Should I wrap an ankle sprain?
A: Compression (elastic bandage or ankle sleeve) is appropriate for Grade I-II sprains to control swelling in the first 48-72 hours. For Grade II-III sprains, a semi-rigid ankle brace (like an Aircast) provides better stability for return to activity. Severe sprains may warrant a boot or cast.

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Related Patient Guides

• Achilles Tendinitis: Symptoms, Treatment & Recovery
• Tarsal Tunnel Syndrome: Symptoms & Treatment
• Posterior Tibial Tendon Dysfunction (PTTD)
• Stress Fracture in the Foot: Symptoms & Recovery
• Foot Arthritis: Types, Symptoms & Treatment Options
• 3D Custom Orthotics at Balance Foot & Ankle
• Gout in the Foot: Symptoms & Treatment
• Diabetic Foot Care: Daily Routine & Warning Signs
• Walking Barefoot: Benefits, Risks & Podiatrist Advice
• Chronic Ankle Instability: Why Your Ankle Keeps Giving Out

Medical References & Sources

• American Podiatric Medical Association — Patient Education
• American Orthopaedic Foot & Ankle Society — Foot Conditions