Ankle Sprain & Recurrent Instability

Overview

An ankle sprain happens when the foot rolls inward, overstretching or tearing the ligaments on the outer side of the ankle. It is one of the most common injuries in sport and in everyday life — stepping off a kerb, missing a stair, landing on someone's foot in basketball or football. Sprains are graded from 1 (mild stretch) to 3 (complete tear).

Most sprains improve substantially within a few weeks. The problem is what happens afterwards. Research shows that a large proportion of people who sprain an ankle go on to sprain it again, and many develop chronic ankle instability — a persistent feeling that the ankle is weak, wobbly or might give way on uneven ground. This is usually not because the ligament is loose, but because the ankle's balance, reaction and muscle control were never fully retrained.

Early, structured rehabilitation is therefore the key, even for a sprain that "feels fine" after a week. Protecting the ankle briefly, then progressively restoring movement, strength and balance, gives you the greatest chance of avoiding the recurrent-sprain cycle.

Causes and risk factors

• Landing awkwardly from a jump or on another player's foot
• Uneven ground, kerbs, stairs and poorly lit paths
• A previous ankle sprain — the strongest predictor of another
• Poor balance and slow reaction of the ankle muscles
• Weak outer hip muscles, which affect how the foot lands
• Reduced ankle flexibility
• Footwear with poor grip or high heels

How we may be able to help

Your assessment checks which ligaments are involved, grades the injury and screens for fractures using established clinical rules (the Ottawa ankle rules). If a fracture is suspected we will direct you to A&E or arrange an X-ray via an online private GP consultation; we do not treat fractures that need casting. We also check the high-ankle ligaments and the tendons, which are sometimes injured alongside.

Physiotherapy is the core of treatment. Early on we aim to control swelling, restore walking and regain ankle movement. Then rehabilitation exercise progresses through strengthening, balance and proprioception (the ankle's sense of position) training, and finally hopping, cutting and sport-specific drills. For chronic instability, this balance and control work is where most of the improvement comes from, even years after the original injury.

Interferential therapy may be used as an adjunct to ease pain and swelling in the first weeks. Kinesiology taping can provide support and feedback as you return to activity. If foot posture is making the ankle more prone to rolling, a 3D foot scan and custom orthotics may be considered. Therapeutic ultrasound is sometimes used to support ligament recovery.

What you can do at home

• For the first 72 hours: protect, elevate, use a wrapped ice pack for 15 minutes several times a day, and apply a compression bandage
• Start gentle ankle circles and up-and-down movements within comfort from day one or two
• Walk as normally as you can; use crutches only briefly if needed
• Once walking is comfortable, practise single-leg balance for 30 seconds, several times a day
• Avoid returning to sport until you can hop on the injured leg without pain
• Do not ignore an ankle that keeps giving way — it can be retrained