A sprained ankle is an injury that occurs when you roll, twist or turn your ankle in an awkward way. This can stretch or tear the tough bands of tissue (ligaments) that help hold your ankle bones together.
Ligaments help stabilize joints, preventing excessive movement. A sprained ankle occurs when the ligaments are forced beyond their normal range of motion. Most sprained ankles involve injuries to the ligaments on the outer side of the ankle.
Treatment for a sprained ankle depends on the severity of the injury. Although self-care measures and over-the-counter pain medications may be all you need, a medical evaluation might be necessary to reveal how badly you've sprained your ankle and to determine the appropriate treatment.
Signs and symptoms of a sprained ankle vary depending on the severity of the injury. They may include:
- Pain, especially when you bear weight on the affected foot
- Tenderness when you touch the ankle
- Swelling
- Bruising
- Restricted range of motion
- Instability in the ankle
- Popping sensation or sound at the time of injury
A sprain occurs when your ankle is forced to move out of its normal position, which can cause one or more of the ankle's ligaments to stretch, partially tear or tear completely.
Causes of a sprained ankle might include:
- A fall that causes your ankle to twist
- Landing awkwardly on your foot after jumping or pivoting
- Walking or exercising on an uneven surface
- Another person stepping or landing on your foot during a sports activity
Factors that increase your risk of a sprained ankle include:
- Sports participation. Ankle sprains are a common sports injury, particularly in sports that require jumping, cutting action, or rolling or twisting of the foot such as basketball, tennis, football, soccer and trail running.
- Uneven surfaces. Walking or running on uneven surfaces or poor field conditions may increase the risk of an ankle sprain.
- Prior ankle injury. Once you've sprained your ankle or had another type of ankle injury, you're more likely to sprain it again.
- Poor physical condition. Poor strength or flexibility in the ankles may increase the risk of a sprain when participating in sports.
- Improper shoes. Shoes that don't fit properly or aren't appropriate for an activity, as well as high-heeled shoes in general, make ankles more vulnerable to injury.
Failing to treat a sprained ankle properly, engaging in activities too soon after spraining your ankle or spraining your ankle repeatedly might lead to the following complications:
- Chronic ankle pain
- Chronic ankle joint instability
- Arthritis in the ankle joint
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