Lateral Ankle Sprain

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 6 min read
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Article Summary

A lateral ligament ankle sprain occurs when the ligaments outside the ankle are stretched beyond their limits. Injury to these ligaments causes pain and swelling in the ankle. Generally, most sprained lateral ligaments are minor and will improve with simple treatments. Other Names Ankle sprain Rolled ankle Inversion Ankle Injury Lateral Ankle Sprains (LALS or LAS) Low Ankle Sprain Illustration of a lateral view of the...

Key Takeaways

  • This article explains Causes in simple medical language.
  • This article explains Risk Factors in simple medical language.
  • This article explains Treatment in simple medical language.
  • This article explains Rehab and Return to Play in simple medical language.
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Definition

A lateral ankle  occurs when the outside the ankle are stretched beyond their limits. Injury to these ligaments causes and in the ankle. Generally, most sprained lateral ligaments are minor and will improve with simple treatments.

Other Names

  • Ankle sprain
  • Rolled ankle
  • Inversion Ankle Injury
  • Lateral Ankle Sprains (LALS or LAS)
  • Low Ankle Sprain

Illustration of a lateral view of the ankle joint with ligaments, bones, and labeled

  • General
    • The injury mechanism is characterized by a high-velocity inversion and internal rotation of the ankle/foot complex
    • Particularly prevalent in field and court sports
    • The vast majority will self resolve in 4-6 weeks, although some may persist for years

Causes

  • General
    • Occurs due to exaggerated, high force inversion and plantarflexion
    • This leads to stretching, tearing, or rupture of the lateral ankle ligaments
    • Typically in a sequential pattern depending on the severity
    • Starts with the anterior talofibular ligament (ATFL) followed by the calcaneofibular ligament (CFL) followed by the posterior talofibular ligament (PTFL)
  • First contact mechanism
    • Due to player-to-player contact with impact by an opponent on the medial aspect of the leg
    • Occurs just before or at foot strike, resulting in a laterally directed force across the ankle
    • This causes the player to land with the ankle in a vulnerable, inverted position
  • Second contact mechanism
    • Forced plantarflexion is where the injured player hit the opponent’s foot when attempting to shoot or clear the ball.

Associated Conditions

  • Ankle Instability
  • Ankle
  • Syndesmotic Sprain
  • Maisonneuve
  • Osteochondral Defect
  • Medial Ankle Sprain

Pathoanatomy

  • Ankle Joint
    • Synovial hinge joint
    • Formed by articulation formed by the distal , Distal  and Talus
  • Lateral Ligaments
    • Lateral Collateral Ligament: ATFL, CFL, PTFL
    • Anterior Talofibular Ligament (ATFL)
    • Calcaneofibular Ligament (CFL)
    • Posterior Talofibular Ligament (PTFL)

Risk Factors

  • General
    • Female > Male
    • Young athletes (under 12) > adolescents (12-18) > adults
    • Height?
    • Weight
  • Orthopedic
    • History of Lateral Ankle Sprain
    • Chronic Ankle Instability
  • Occupation
    • Military Personel
    • Dancers
  • Sports
    • Netball
    • Volleyball
    • Hockey
    • Football
    • Basketball
    • Soccer[15]
  • Type of footwear
  • Type of supportive device

  • Fractures & Dislocations
    • Distal Tibia Fracture
    • Distal Fibular Fracture
    • Talus Fracture
    • Fracture
    • Subtalar
    • Ankle Fracture (& Dislocation)
    • Peroneal Subluxation
  • Muscle and Injuries
    • Peroneal Tendon Injuries
    • Achilles
    • Rupture
    • Posterior Tibial Tendon Dysfunction
    • Flexor Hallucis Longus
  • Ligament Injuries
    • Lateral Ankle Sprain
    • Medial Ankle Sprain
    • Syndesmotic Sprain
    • Chronic Ankle Instability
    • Intersection Foot
  • Bursopathies
    • Retrocalcaneal
  • Nerve Injuries
    • Peroneal Nerve Injury
    • Tarsal Tunnel Syndrome
  • Arthropathies
    • Osteoarthritis of the Ankle
    • Osteochondral Defect Talus
  • Pediatrics
    • Fifth Apophysitis (Iselin’s Disease)
    • Calcaneal Apophysitis (Sever’s Disease)
  • Other
    • Haglund’s Deformity
    • Posterior Ankle Impingement Syndrome
    • Tarsi Syndrome

Features

Clinical demonstration of anterior drawer test of the ankle[16]
  • History
    • Athletes typically report a sudden twisting of the ankle joint
    • They may have an inability to bear weight
    • They usually can identify the palpatory painful spot
    • Also endorse swelling, (may be )
    • Inability to return to sport
    • Sometimes endorse a snap or crack
  • Physical Exam: Physical Exam Ankle
    • Palpate all bony and soft tissue structures (see: Ottawa Ankle Rules)
    • If no pain along with ATFL distribution, likely not a standard LAS
  • Special Tests
    • Squeeze Test: Apply compression to medial/lateral calf
    • Anterior Drawer Test Ankle: translate distal tibia posteriorly to evaluate for laxity
    • Talar Tilt Test: Passively evert while palpating lateral talus

Diagnostic of the anterior talofibular ligament demonstrating rupture with the hypoechoic fluid collection. Case courtesy of Dr Maulik S Patel.

Radiographs

  • Standard Radiographs Ankle
    • Typically normal
  • Ottawa Ankle Rules
    • Decision-making rules can help determine if the x-ray is necessary
    • They are close to 100% sensitive (need citation)

Ultrasound

  • Van Dijk et al
    • Early on they found sensitivity of 92%, specificity 64%
    • Inconclusive physical exam they found sensitivity of 100%, specificity 72%
  • Among ED physicians, accuracy was similar to MRI[19]

MRI

  • Useful when other soft tissue injuries are suspected
    • Tendinous and syndesmotic trauma
    • Osteochondral lesions
    • Occult fractures
  • Joshy et al: sensitivity 92-100%, specificity 100%[20]
  • In comparison with arthroscopy, MRI (93%) was superior to US (63%) incorrectly locating the injured portion of the ATFL

Classification

  • Grade I (mild)
    • Injury: ligament fiber stretch without macroscopic rupture
    • Clinically minor swelling, palpatory tenderness
    • Hardly any functional loss
    • No increased instability
  • Grade II (moderate)
    • Injury: partial ligament tear
    • Moderate pain, swelling, and palpatory tenderness
    • Mild to moderate instability
    • Moderate functional disability
  • Grade III (severe)
    • Injury: complete tear of the ligament and joint capsule rupture
    • Severe bruising, swelling, and pain
    • Significant loss of function and an increased instability
    • Unable to bear weight and walk normally

Treatment

Prognosis

  • Nonoperative vs Operative
    • Surgical intervention is associated with increased cost, risk of complications (wound infection, nerve injury, dystrophy, poor wound healing)[22]
    • Nonoperative vs operative management of grade III has failed to demonstrate a superior modality, thus nonoperative management is often the preferred approach[23]
  • Prevention of recurrence
    • PT helps with the prevention of recurrence[22]
  • Missed time
    • Mean layoff per ankle sprain in soccer is reported between 7 and 18 days[24]
    • 83–89% of the ankle sprains require athletes less than 4 weeks of loss of activities[25]
    • RTP after surgical management ranged from 77 to 105 days in one study by Pearce[26]
  • Return to play
    • The vast majority of athletes will return to full pre-injury level of play
    • Important to distinguish the complex injuries from the simple single ligament injuries

Nonoperative

  • Indications
    • The vast majority of cases
  • PRICE Therapy
    • Typically for the first 3-5 days[27]
  • NSAIDS
    • Oral or topical appear to help[28]
  • External Support
    • Doherty et al: MA, SR found external support (taping, bracing, and orthoses) is effective for improving function[22]
    • Duration of total immobilization should be brief and early mobilization should be encouraged
    • By 1-2 weeks transition to External Ankle Brace
    • No difference between the tape, semi-rigid brace, or lace up a brace at 6 months
  • Physical Therapy
    • Doherty et al: MA, SR found PT improves self-reported function
    • Early PT combined with progressive weight-bearing
  • Manual Therapy
    • Unclear whether manual therapy helps with the function
  • Ice Therapy
    • Appears to help as a component of RICE management when combined with physical therapy
  • Acupuncture
    • It May have some benefit in SR/MA but the overall evidence is lacking due to low methodological quality
  • Unknown benefit[22]
    • Therapeutic Ultrasound
    • Low-Level Laser Therapy
    • Hyperbaric Oxygen
    • Electrical Stimulation

Operative

  • Indications
    • Unknown
  • Technique
    • Primary reconstruction

Rehab and Return to Play

Rehabilitation

  • General
    • Progressive weight-bearing
    • Early active range of motion (ROM) exercises
    • Followed by strengthening exercises, proprioceptive training, and functional exercises
  • The final phase of rehab
    • Progressively simulate the physical demands of the respective sports modality
    • Often includes jumping, turning, and twisting
  • Several rehab programs have been suggested
    • National Athletic Trainers Association[32]
    • Renstrom et al protocol[33]
    • Zoch et al protocol[34]
  • Postoperative[26]
    • 1-2 weeks: lower leg cast
    • 2-4 weeks: walking boot, active rehab

Return to Play

  • General
    • Difficult to predict when an athlete can RTP
    • No formal consensus guidelines or criteria
    • Consider the use of the Foot And Ankle Outcome Score (FAOS), which is not currently validated[35]
    • Time for RTP depends on several factors including the severity of the injury, the ability of the athlete, available resources
  • Performance-based
    • Athletes should be able to progress from simple tasks to complex tasks
    • Perform 90% of function compared to unaffected ankle
    • Progress through sport-specific tasks
  • Modalities
    • Proprioception
    • Balance (wobble board)
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Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
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Questions to ask

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Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Rest, drink safe water, and observe symptoms carefully.
  • Keep a written note of symptoms, duration, temperature, medicines already taken, and allergy history.
  • Seek medical care quickly if symptoms are severe, worsening, or unusual for the patient.

OTC medicine safety

  • For mild pain or fever, ask a registered pharmacist or doctor before using common over-the-counter pain/fever medicines.
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Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
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Get urgent help if

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Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

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Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

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Care roadmap for: Lateral Ankle Sprain

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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