I Rolled My Ankle — Do I Need an X-Ray?

You rolled it, felt that sickening twist, and now you're standing there wondering if it's a bad sprain or something broken, and whether you actually need to go get it x-rayed. Here's how to work that out.

The test emergency departments actually use

There's a well-validated clinical tool called the Ottawa Ankle Rules, used in emergency departments specifically to work out who needs an x-ray and who doesn't. An x-ray is generally recommended if there's bone tenderness right at the tip or back edge of either ankle bone (the bony bumps on the inside and outside of your ankle), or if you're unable to take four steps immediately after the injury and right now, regardless of limping.

If you don't have tenderness in those specific spots and you can bear weight and take a few steps, even if it's uncomfortable, a fracture is unlikely and it's very likely a soft tissue sprain rather than a break.

What's actually torn in a sprain

Most ankle sprains, the classic "rolled it inward" type, injure the lateral ligaments on the outside of your ankle, most commonly the ATFL (anterior talofibular ligament). This is the ligament that resists exactly the rolling-inward motion that causes most sprains.

Grading it

Grade 1. Mild stretching, minimal swelling, you can usually still walk with some discomfort.

Grade 2. Partial tear, noticeable swelling and bruising, walking is painful and often limited.

Grade 3. Complete tear, significant swelling, real instability in the joint, and weight-bearing is usually very difficult.

How long will this take

Grade 1 sprains often improve substantially within one to two weeks. Grade 2 sprains typically take four to six weeks before returning to full activity. Grade 3 sprains can take eight weeks or more, and occasionally need imaging or bracing depending on severity.

One thing worth knowing: even mild sprains that seem to "feel fine" within a week or two often haven't actually finished healing underneath, which is a big part of why ankle sprains have such a high rate of recurring, going back to full sport too early on ligaments that look and feel better but haven't rebuilt their full strength yet.

What to do right now

In the first 48 to 72 hours: rest from aggravating activity, ice for comfort, compression if you have a bandage, and elevation when possible. Gentle movement within a comfortable range is fine and generally better than total immobilisation for a straightforward sprain.

When to actually get it checked

Based on the Ottawa rules above, if you've got bone tenderness at either ankle bone or genuinely can't take four steps, get it checked, ideally same day. Beyond that, if swelling and pain aren't clearly improving within a few days, or the ankle feels unstable or keeps rolling on you afterward, that's worth an assessment rather than continuing to wait.

How physio helps

Assessment confirms the grade and location of the injury and rules out anything that needs onward referral. Early treatment focuses on managing swelling and restoring pain-free movement, followed by a structured strengthening and balance program, since balance and proprioception, your ankle's sense of where it is in space, are exactly what's compromised after a significant sprain and exactly what predicts whether it happens again.

This last part matters more than most people realise. Sprained ankles that skip proper balance retraining have a genuinely high chance of rolling again, sometimes repeatedly, which is why "it feels better now" isn't the same as "it's actually ready."

Book an assessment

If you're unsure how bad your sprain is, or you keep rolling the same ankle, book an assessment online or call 0450 075 955. Read more about our sports and gym injury rehabilitation, or check our FAQ page for more on getting started.

This article is general information, not a substitute for individual medical advice. If you have bone tenderness at either ankle bone or cannot take four steps, seek an x-ray promptly.