Ankle Sprain Classification
An inversion injury, the most common cause of ankle sprains, occurs when the ankle rolls outward and the foot turns inward. It results in stretching and tearing of the ligaments on the outside of the ankle. In an eversion injury, the ankle rolls inward and the foot turns outward, damaging the ligaments at the inside of the ankle. If the foot is forced up, or the leg twists forcefully while the foot is planted, the ligaments that join the leg bones together above the ankle may be injured. This is called a high ankle sprain. It can happen either alone or along with an inversion or eversion sprain. See a picture of types of ankle sprains.
In an ankle sprain, damage to the ligament varies from simply stretched or slightly torn to completely torn. Your doctor will grade your sprain accordingly:
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