What Is a Sprain?

Types of Ankle Sprains

A sprain is an injury to a ligament. Ligaments are strong tissues around joints which attach bones together. They give support to joints. A ligament can be injured, usually by being stretched during a sudden pull. The ligaments at the side of the ankle are the ones most commonly sprained.

A damaged ligament causes inflammation, swelling, and bleeding (bruising) around the affected joint. Movement of the ankle joint is painful when you have a sprained ankle. The picture shows a badly sprained ankle with fairly extensive bruising.

The severity of a sprain is graded into:

Grade I - mild stretching of the ligament without joint instability.
Grade II - partial rupture (tear) of the ligament but without causing joint instability (or with mild instability of the joint).
Grade III - complete rupture (tear) of the ligament with instability of the joint. Sometimes this is simply called a severe ankle sprain.


Source: patient.co.uk

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