Ankle Sprains: Why Yours Keeps Happening

The problem nobody warns you about

Ankle sprains are treated as trivial. You roll it, it swells, you limp for a week, and then you get on with life.

For a large proportion of people, that is not the end of the story. A substantial share of those who sprain an ankle go on to have ongoing symptoms — repeated sprains, a sense of the ankle giving way, or persistent discomfort — long after the original injury.

That is not because the ligament failed to heal. It is usually because recovery stopped when the pain stopped, and the pain stops well before the ankle is actually ready.

What is actually injured

The classic sprain happens when the foot rolls inward, stretching or tearing the ligaments on the outside of the ankle. Most commonly the anterior talofibular ligament is involved.

Sprains are graded by severity, from stretching of the ligament fibres, through partial tearing, to complete rupture with clear instability. The grade influences the timeline, but — and this surprises people — it influences the treatment approach less than you would expect. Even complete ruptures of the outer ankle ligaments are usually managed without surgery, with good results.

Do you need an X-ray?

Not usually. Most sprains do not need imaging, and there are well-established clinical rules used internationally to decide.

An X-ray is warranted when there is bone tenderness at specific points on the ankle bones, or when the person cannot bear weight for four steps immediately after the injury and at assessment. Otherwise, a fracture is unlikely and imaging adds little.

Get it looked at promptly rather than waiting if you cannot weight-bear, if there is obvious deformity, if numbness or a cold foot is present, or if the injury happened in a child, where growth plates change the assessment.

The first days

The old advice to rest completely has been replaced by something better supported: protect it, then get it moving.

• Protect early, limiting painful loading in the first day or two.
• Start moving within comfort as soon as you reasonably can. Early controlled movement produces better outcomes than prolonged immobilisation for the great majority of sprains.
• Manage swelling with elevation and compression.
• Weight-bear as pain allows, using support if needed rather than avoiding walking altogether.
• Get assessed if you cannot weight-bear, or if the swelling and bruising are severe.

Why it keeps happening

This is the heart of it. Three things go wrong, and only the first one is usually addressed.

One — the ligament may heal lengthened. If the ankle is not protected and then progressively loaded, the ligament can heal in a slightly slack position, leaving mechanical looseness.

Two — the ankle forgets where it is. Ligaments are not just straps; they carry sensors that tell the brain the joint's position. A sprain damages those sensors. The result is impaired proprioception — the ankle's sense of its own position — so the muscles react a fraction too late when the foot lands awkwardly. This is the single biggest reason ankles re-sprain, and it is invisible on any scan.

Three — the surrounding muscles weaken. The peroneal muscles on the outside of the leg are the active defence against rolling inward. After a sprain they are typically weaker and slower to fire, and nothing restores that except deliberate training.

A person who rests until it stops hurting has addressed none of these. The ankle feels fine walking in a straight line on flat ground, and then fails the first time it lands on an uneven surface.

The part everyone skips

Balance and neuromuscular control training is the treatment with the strongest evidence for preventing recurrent sprains. It is also the most commonly omitted.

It is unglamorous: standing on one leg, then with eyes closed, then on an unstable surface, then adding movement, then adding sport-specific demands. It looks too simple to matter. It is the difference between an ankle that holds and an ankle that does not.

Programmes of this kind have been shown to reduce recurrence meaningfully in people with a history of sprains. If you do one thing from this article, do this.

When it is not a simple sprain

Several injuries masquerade as an ordinary sprain and behave very differently:

• High ankle sprain, where the injury is to the ligaments between the two shin bones above the ankle. Pain is higher up, it hurts to twist the foot outward, and recovery takes considerably longer.
• Fractures, including small avulsion fractures and injuries to the fifth metatarsal on the outer edge of the foot.
• Peroneal tendon injury, causing pain and sometimes a snapping sensation behind the outer ankle bone.
• Osteochondral injury — damage to the cartilage surface inside the joint, which should be suspected when a sprain has deep persistent pain, catching, or swelling that will not settle after months.

An ankle that is not following the expected recovery curve at six to eight weeks deserves reassessment rather than more of the same.

Returning to sport: criteria, not calendar

The question "how long until I can play?" has a better answer than a number of weeks.

Reasonable criteria before returning to cutting and pivoting sport:

• Full, pain-free range of movement compared with the other side
• Strength restored, particularly in the muscles that resist rolling inward
• Single-leg balance comparable to the uninjured side, including with eyes closed
• Hopping and landing without pain, apprehension or loss of control
• Sport-specific movement — cutting, pivoting, decelerating — rehearsed before it is required competitively

Returning on the calendar rather than on capability is how the second sprain happens.

If you already have an unstable ankle

Recurrent instability is not something you have to accept.

A structured programme of strengthening and balance training resolves symptoms for a meaningful proportion of people even years after the original injury. It is worth doing properly before considering anything else.

Bracing or taping reduces recurrence during high-risk activity and is a reasonable adjunct, particularly in sport. It does not replace the training.

Surgery to reconstruct the outer ankle ligaments exists and works well, but it is reserved for genuine mechanical instability that persists after a proper rehabilitation programme — not for an ankle that simply has not been trained.

Warning signs

Seek prompt assessment for inability to weight-bear, obvious deformity, numbness or a cold or pale foot, a hot swollen ankle with fever, or an ankle injury in a child or adolescent.

What we would do at IDUNN

We start by establishing that it is a straightforward sprain, which means examining for the injuries that imitate one — high ankle sprain, fracture, tendon and cartilage injury — rather than assuming.

Then we treat the reason it keeps happening rather than only the ligament. That means restoring range and strength, and then spending real time on balance and control work, because that is the component with the best evidence and the one most often left out.

And we set return-to-sport on capability rather than on a date. An ankle that walks comfortably is not an ankle that is ready to cut and pivot, and the gap between those two states is exactly where the next sprain lives.

What about ice in the first 48 hours?

The advice most people remember is RICE — rest, ice, compression, elevation. It has been revised, and the revision is worth understanding.

The concern is that inflammation after an injury is not simply a problem to be suppressed. It is the process that begins healing. Aggressive, prolonged efforts to shut it down may not help, and complete rest is now clearly understood to be counterproductive.

The current emphasis is different:

• Protect briefly, then load progressively. Movement and graded weight-bearing are treatment, not something to postpone until it stops hurting.
• Compression and elevation remain useful for managing swelling.
• Ice is reasonable for pain relief in the early period if it makes you more comfortable. It is not a healing treatment, and there is no need to apply it religiously for days.
• Avoid the things that genuinely impair early healing, including alcohol and unnecessary complete immobilisation.

The practical summary: use ice if it helps you feel better in the first day or two, but do not let it become the plan. Getting the ankle moving and loaded appropriately is what actually determines how this ends.