
Ankle Sprains in Young Athletes: When to Get Imaging
Ankle sprains are one of the most common injuries in youth sports. Between soccer fields, basketball courts, football practices, and gymnastics gyms across Long Island, thousands of young athletes turn or roll an ankle every season. For most, the injury feels dramatic in the moment but resolves within a few weeks with rest, ice, and a return-to-play progression.
For some, though, a sprain masks a more serious injury—one that won’t improve with rest alone.
Knowing when a young athlete’s ankle sprain warrants imaging isn’t intuitive. Ankles are complex joints with multiple ligaments, bones, and growth plates, and the difference between a straightforward sprain and something more serious isn’t always visible from the outside. Getting it wrong in either direction has consequences: unnecessary imaging exposes young patients to costs and (in some cases) radiation, while missed injuries can turn into chronic instability, long-term joint damage, or worse.
Dr. Zusmanovich evaluates young athletes with ankle injuries every week across our West Babylon, Patchogue, Commack, and East Setauket offices. Here’s what parents, coaches, and young athletes should understand about when a sprained ankle actually needs a closer look.
Serving Long Island athletes at 4 convenient locations.
What Actually Happens During an Ankle Sprain
Most ankle sprains happen when the foot rolls inward (an “inversion” injury), stretching or tearing the ligaments on the outside of the ankle. The three ligaments most commonly involved are:
- Anterior talofibular ligament (ATFL) — the most frequently injured
- Calcaneofibular ligament (CFL) — often injured alongside the ATFL.
- Posterior talofibular ligament (PTFL) — less commonly injured
Sprains are graded on severity:
Grade 1 (Mild) — Stretching of ligament fibers with minimal tearing. Mild swelling and tenderness, minimal instability, and usually resolves within 1-3 weeks.
Grade 2 (Moderate) — Partial ligament tearing. Moderate swelling, bruising, some instability, and typically requires 3-6 weeks of recovery.
Grade 3 (Severe) — Complete ligament tear. Significant swelling, extensive bruising, marked instability, and often requires 6-12 weeks or longer. May need surgical evaluation.
While most sprains fall into Grade 1 or 2, distinguishing them from more serious injuries — especially in young athletes with open growth plates — requires clinical judgment and, sometimes, imaging.
Why Young Athletes Are Different
Adult ankles and youth ankles are not the same, and this matters more than most people realize.
Open growth plates. Young athletes still have open growth plates (physes) in their ankle bones. Growth plates are made of cartilage and are structurally weaker than the surrounding bone. This means that in a young athlete, what appears to be a “sprain” can actually be a growth plate fracture — because the ligament pulled on the growth plate hard enough to fracture it before it stretched enough to tear.
Salter-Harris fractures — injuries involving the growth plate — are relatively common in young athletes with ankle injuries and can be missed on physical examination alone. If left untreated, they can cause growth abnormalities, limb length discrepancies, and long-term joint problems.
Different injury patterns. Young athletes tend to sustain avulsion fractures (small bone chips pulled off by ligaments) more often than adults. These may not be visible without imaging.
Reporting bias. Young athletes often minimize pain to keep playing. A high pain tolerance can mask a serious injury, and parents can miss warning signs when a child insists “it’s fine.”
Multiple potential injuries. A young athlete’s ankle sprain can coexist with a fibula fracture, a fifth metatarsal fracture, a talus injury, or an osteochondral defect — none of which are obvious without imaging.
For all these reasons, the threshold for imaging in young athletes is often lower than in adults.
When to Get Imaging: The Warning Signs
Not every ankle sprain needs an X-ray or MRI. In fact, imaging every sprain would create unnecessary cost and radiation exposure. But certain warning signs indicate that imaging is warranted.
Immediate Warning Signs (Consider Imaging Same Day)
Any of these signs suggest the injury may be more than a simple sprain and should trigger prompt medical evaluation:
Inability to bear weight — If the athlete cannot put weight on the ankle for more than 4 steps immediately after injury or in the emergency room, imaging is typically warranted. This is one of the clearest indicators from the Ottawa Ankle Rules—a widely used clinical decision guideline.
Bone tenderness in specific areas — Tenderness directly on the bone (not the surrounding soft tissue) at the:
- Posterior edge or tip of either malleolus (the bony prominences on each side of the ankle)
- Base of the fifth metatarsal (the outside of the midfoot)
- Navicular bone (on top of the midfoot)
Significant deformity — Any visible deformity, angulation, or displacement of the ankle or foot.
Severe swelling within minutes — Immediate, dramatic swelling that develops within the first 30 minutes to an hour suggests a more significant injury than a simple ligament strain.
Numbness or tingling — Any nerve-related symptoms in the foot or toes.
Cold, pale foot — Signs of compromised blood flow (extremely rare but a genuine emergency).
Snap or pop at time of injury — An audible or felt “pop” often indicates ligament rupture or fracture.
Delayed Warning Signs (Consider Imaging Within 1-2 Weeks)
If any of these appear during recovery, imaging should be considered:
No improvement after 5-7 days — A simple sprain should show meaningful improvement within a week. Persistent significant pain or swelling suggests something more serious.
Ongoing inability to bear weight after 3-5 days — Most Grade 1 and mild Grade 2 sprains allow protected weight bearing within a few days.
Persistent pain over specific bony areas — Especially the growth plate regions in young athletes.
Repeat injury to the same ankle — Recurring sprains may indicate chronic instability or an underlying anatomical issue.
Symptoms worsening rather than improving
Locking, catching, or clicking sensations — May indicate an osteochondral injury (a piece of cartilage or bone knocked loose).
Feeling of instability — The ankle “giving way” during normal activity.
Sport-Specific Considerations
Certain sports create injury patterns that warrant a lower threshold for imaging:
Basketball, soccer, football — High rates of Grade 3 sprains and associated fractures.
Gymnastics and dance — Repetitive stress and high-impact landings create fracture risk.
Running and track — Stress fractures can mimic sprain symptoms.
Contact sports — Direct blows can cause combination injuries that pure ligament sprains don’t produce.
What Types of Imaging Are Used
Different imaging modalities serve different purposes:
X-ray — The first-line imaging study for suspected fractures. Effective for identifying most fractures, growth plate injuries, and dislocations. Low-cost and widely available.
MRI — More sensitive than X-ray for soft-tissue injuries. Detects ligament tears, cartilage damage, osteochondral defects, and bone marrow edema (early stress fractures). More expensive and time-consuming, typically not needed for straightforward sprains.
CT scan — Occasionally used for complex fractures. Provides detailed bone imaging but exposes the patient to more radiation than X-ray.
Ultrasound — Growing role in evaluating ligament injuries, particularly in specialized sports medicine settings.
An experienced sports medicine orthopedic surgeon will determine which (if any) imaging is appropriate based on the specific injury pattern.
Why Missed Injuries Matter
The consequences of missing a serious ankle injury in a young athlete can extend far beyond the initial healing period.
Growth abnormalities. Untreated growth plate injuries can cause the affected bone to stop growing normally, leading to limb-length discrepancies or angular deformities that may not become obvious for years.
Chronic instability. Ligament injuries that don’t heal properly can lead to recurring sprains, ankle looseness, and long-term joint problems.
Early arthritis. Unrecognized cartilage damage can accelerate ankle arthritis, sometimes appearing in patients as young as their 20s and 30s.
Missed fractures. Small avulsion fractures or stress fractures can worsen with continued activity, potentially requiring more invasive treatment later.
Return-to-sport delays. Athletes who return to play too quickly on an incompletely healed injury are far more likely to re-injure the same ankle, often more severely.
Getting the right diagnosis at the start doesn’t just protect the immediate injury — it protects the athlete’s long-term joint health.
What Parents and Coaches Should Do
If a young athlete injures an ankle, here’s a practical framework:
Immediately:
- Stop play immediately — do not “walk it off” for serious injuries.
- Rest, ice, compression, elevation (RICE)
- Assess weight-bearing ability
- Check for the immediate warning signs listed above.
- If any red flag signs are present, seek same-day medical evaluation.
- If in doubt, get evaluated.
In the first 24-72 hours:
- Continue RICE protocol
- Use over-the-counter anti-inflammatories if appropriate (with parent/pediatrician guidance)
- Monitor for worsening swelling, bruising, or pain.
- Encourage rest, not activity.
- Schedule an evaluation with a sports medicine orthopedic surgeon if symptoms are moderate to severe.
In the first week:
- Look for improvement — some improvement should be visible each day.
- Do NOT allow return to sport without professional clearance.
- Watch for delayed warning signs.
- If no meaningful improvement by day 5-7, schedule an evaluation.
Before return to play:
- Full pain-free range of motion
- Strength restored (compared to uninjured side)
- Balance and proprioception restored.
- Ability to perform sport-specific movements without pain
- Professional clearance
Common Mistakes to Avoid
Certain patterns lead to poorly-healed ankle injuries and long-term problems.
“Walking it off.” Continuing to play or practice on a fresh ankle injury dramatically increases the risk of worsening the injury or developing chronic instability.
Waiting too long to get evaluated. Delayed diagnosis of fractures or growth plate injuries can lead to lasting complications.
Rushing return to play. Athletes who return before they’re truly ready re-injure at 2-3x the rate of those who complete a proper progression.
Skipping physical therapy. Even Grade 1 sprains benefit from targeted rehabilitation to restore strength and proprioception and prevent re-injury.
Trusting the athlete’s own assessment. Young athletes underreport pain to keep playing. Objective assessment matters more than what they say.
Ignoring recurring “sprains.” Repeated ankle injuries in the same athlete often indicate an underlying issue that needs professional evaluation.
Frequently Asked Questions
When should a doctor see a child’s ankle sprain?
Any ankle sprain with inability to bear weight, significant bone tenderness, deformity, or severe swelling should be evaluated the same day. Sprains that don’t improve within 5-7 days, that produce persistent bony tenderness, or that involve repeat injury to the same ankle should also be professionally evaluated.
Any ankle sprain with inability to bear weight, significant bone tenderness, deformity, or severe swelling should be evaluated the same day. Sprains that don’t improve within 5-7 days, that produce persistent bony tenderness, or that involve repeat injury to the same ankle should also be professionally evaluated.
Do all ankle sprains need X-rays?
No. Most straightforward sprains do not require imaging. However, young athletes have a lower threshold for imaging than adults because growth plate injuries can be missed on physical exam.
No. Most straightforward sprains do not require imaging. However, young athletes have a lower threshold for imaging than adults because growth plate injuries can be missed on physical exam.
How long does an ankle sprain take to heal in a young athlete?
Mild sprains typically resolve in 1-3 weeks. Moderate sprains take 3-6 weeks. Severe sprains can require 6-12 weeks or longer. Rushing return to sport is one of the biggest predictors of re-injury.
Mild sprains typically resolve in 1-3 weeks. Moderate sprains take 3-6 weeks. Severe sprains can require 6-12 weeks or longer. Rushing return to sport is one of the biggest predictors of re-injury.
Can a young athlete play sports with a sprained ankle?
Not until the athlete has pain-free full range of motion, restored strength, restored balance, and clearance from a sports medicine specialist. Playing on an incompletely healed sprain dramatically increases re-injury risk.
Not until the athlete has pain-free full range of motion, restored strength, restored balance, and clearance from a sports medicine specialist. Playing on an incompletely healed sprain dramatically increases re-injury risk.
What’s the difference between an ankle sprain and a fracture?
Sprains involve ligament injury; fractures involve bone injury. The two can occur together. Distinguishing them requires clinical evaluation and often imaging — they’re not always distinguishable based on symptoms alone.
Sprains involve ligament injury; fractures involve bone injury. The two can occur together. Distinguishing them requires clinical evaluation and often imaging — they’re not always distinguishable based on symptoms alone.
Are growth plate injuries in ankles serious?
They can be. Untreated growth plate injuries can lead to growth abnormalities, limb length discrepancies, and long-term joint problems. This is why young athletes have a lower threshold for imaging than adults.
They can be. Untreated growth plate injuries can lead to growth abnormalities, limb length discrepancies, and long-term joint problems. This is why young athletes have a lower threshold for imaging than adults.
Should a young athlete see a pediatrician or an orthopedic surgeon after a bad ankle sprain?
For minor sprains, a pediatrician or urgent care can typically provide adequate care. For moderate to severe sprains, sprains with any warning signs, or injuries in competitive athletes hoping to return to play, a sports medicine orthopedic surgeon is often the more appropriate specialist.
For minor sprains, a pediatrician or urgent care can typically provide adequate care. For moderate to severe sprains, sprains with any warning signs, or injuries in competitive athletes hoping to return to play, a sports medicine orthopedic surgeon is often the more appropriate specialist.
What causes recurring ankle sprains in young athletes?
Recurring sprains typically result from incomplete healing of the original injury, inadequate rehabilitation, chronic instability, or underlying anatomical issues. A sports medicine specialist should evaluate athletes with recurring sprains.
Recurring sprains typically result from incomplete healing of the original injury, inadequate rehabilitation, chronic instability, or underlying anatomical issues. A sports medicine specialist should evaluate athletes with recurring sprains.
How can we prevent ankle injuries in young athletes?
Prevention strategies include proper warm-up, appropriate footwear for the sport, ankle strengthening exercises, balance and proprioception training, and gradual increases in training intensity. Athletes with a history of prior sprains may benefit from ankle braces during high-risk activities.
Prevention strategies include proper warm-up, appropriate footwear for the sport, ankle strengthening exercises, balance and proprioception training, and gradual increases in training intensity. Athletes with a history of prior sprains may benefit from ankle braces during high-risk activities.
What’s a sports medicine specialist and how do they differ from a general orthopedic surgeon?
Sports medicine specialists have additional fellowship training focused on athletic injuries. They typically have deeper expertise in return-to-play decision-making, sport-specific injury patterns, and treatment strategies for competitive athletes.
Sports medicine specialists have additional fellowship training focused on athletic injuries. They typically have deeper expertise in return-to-play decision-making, sport-specific injury patterns, and treatment strategies for competitive athletes.
When to See a Sports Medicine Orthopedic Surgeon
Long Island athletes and their families should consider scheduling an evaluation if:
- An ankle sprain hasn’t improved within 5-7 days.
- Weight-bearing is still painful or impossible after 3-5 days.
- Any of the immediate warning signs described above appear.
- A young athlete is having recurring ankle sprains.
- The athlete needs professional clearance to return to competitive play.
- Parents want a definitive answer on whether the injury is “just a sprain” or something more serious.
Early evaluation typically leads to faster, more complete recovery—and can prevent the frustrating cycle of re-injury that comes from returning to play too soon.
Schedule an Evaluation With Dr. Zus Orthopedics
Dr. Mikhail Zusmanovich is a board-certified orthopedic surgeon and Castle Connolly Top Doctor with fellowship training at the Cedars-Sinai Kerlan-Jobe Institute — one of the country’s premier sports medicine programs. He has served as an assistant team physician for the LA Galaxy, LA Angels, Anaheim Ducks, and LA Sparks, giving him a unique perspective on athletic injuries at every level, from youth sports to professional athletes. Call today or schedule an appointment online. Get the right diagnosis. Get back to your sport safely.


