What muscles could cause outer ankle pain?

Muscles that may contribute to outer ankle pain include fibularis longus, fibularis brevis, fibularis tertius, extensor digitorum longus. Trigger points, strains, or weakness in these muscles can refer pain to this area.

Lower Leg

Outer Ankle

Q: What causes pain in the outer ankle?

Common causes of outer ankle pain include lateral ankle sprain (inversion injury), peroneal tendinitis or tendon subluxation, chronic ankle instability from repeated sprains, sinus tarsi syndrome, lateral ankle impingement. The specific cause depends on the nature of the pain, how it started, and which movements aggravate it.

Pain on the outer (lateral) ankle commonly involves the fibularis (peroneal) muscles, lateral ankle ligaments, and the sinus tarsi. Lateral ankle sprains are the most common musculoskeletal injury overall, and recurrent instability can lead to chronic outer ankle pain.

Medical Disclaimer

This information is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare provider for proper diagnosis and treatment of any pain or medical condition.

Common Causes

Lateral ankle sprain (inversion injury)

Peroneal tendinitis or tendon subluxation

Chronic ankle instability from repeated sprains

Sinus tarsi syndrome

Lateral ankle impingement

Muscles in This Area

Lower Leg

fibularis longus

The fibularis longus runs along the outer lower leg, crossing under the foot to evert and stabilize the arch. It powers push-off in sprinting and side-to-side movements. Crucial for runners to avoid ankle sprains and maintain foot alignment.

Fibularis longus tendinopathyPeroneal tendon splitAnkle eversion sprain

Lower Leg

fibularis brevis

The fibularis brevis, aka peroneus brevis, lies low on the outer lower leg and everts the foot while plantarflexing it. It's essential for lateral stability in running, surfing, or agility drills. Fitness athletes strengthen it to prevent ankle rolls.

Peroneus brevis tendinopathyPeroneal tendon subluxationFifth metatarsal stress fracture

Lower Leg

fibularis tertius

The fibularis tertius is a small muscle on the front-outer lower leg that assists in dorsiflexion and eversion. It's active in quick foot lifts during running or hiking. Often absent, but when present, aids ankle agility in sports.

Fibularis tertius strainAnterior shin splints

Lower Leg

extensor digitorum longus

The extensor digitorum longus runs lateral shin from knee to foot, extending toes 2-5 and dorsiflexing ankle. Builds shin definition for runners.

Anterior tibial stress syndromeEDL tendonitisFoot drop

Stretches That May Help

Standing peroneal stretch

Golfer's towel stretch

Peroneal stretch with band

Ankle inversion stretch

Ankle plantarflexion stretch

Eversion band stretch

Kneeling shin stretch

Toe flexor stretch

Ankle plantarflexion hold

Recommended Exercises

When to See a Doctor

Seek medical attention if the ankle is significantly swollen and bruised, you cannot bear weight, the ankle feels unstable or gives way, or if pain persists beyond a few weeks after a sprain.